/**
 * 广梦云 · 官网样式
 * Theme: Tech / Cyber-Professional Dark
 */

:root {
    /* 基础色 */
    --clr-bg: #07090f;
    --clr-bg-alt: #0d111a;
    --clr-bg-elev: #131826;

    /* 主色：科技蓝 + 青 */
    --clr-primary: #3b82f6;
    --clr-primary-hover: #2563eb;
    --clr-primary-light: rgba(59, 130, 246, 0.12);
    --clr-accent: #22d3ee;
    --clr-accent-light: rgba(34, 211, 238, 0.12);

    --clr-text: #eef2ff;
    --clr-text-muted: #8b95ae;
    --clr-text-dim: #5d6678;

    --clr-border: #1a2030;
    --clr-border-light: #232a3d;
    --clr-border-glow: rgba(59, 130, 246, 0.45);

    --clr-success: #10b981;
    --clr-warning: #f59e0b;
    --clr-danger: #ef4444;

    --clr-highlight: linear-gradient(160deg, rgba(59,130,246,0.12) 0%, rgba(34,211,238,0.06) 100%);
    --clr-border-highlight: #2b4ea8;

    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
    --gradient-text: linear-gradient(135deg, #60a5fa 0%, #22d3ee 50%, #67e8f9 100%);

    --shadow-glow: 0 8px 40px -12px rgba(59,130,246,0.4);
    --shadow-card: 0 4px 24px -8px rgba(0,0,0,0.6);

    --font-main: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Menlo', monospace;

    --max-width: 1280px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; }

/* ========== 全局背景：网格 + 光晕 ========== */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.bg-orb {
    position: fixed; z-index: -1; pointer-events: none;
    border-radius: 50%; filter: blur(120px); opacity: 0.5;
}
.bg-orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(59,130,246,0.5) 0%, transparent 70%);
    top: -200px; left: -100px;
}
.bg-orb-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(34,211,238,0.35) 0%, transparent 70%);
    top: 200px; right: -150px;
}

/* ========== 工具类 ========== */
.text-primary { color: var(--clr-primary); }
.text-muted { color: var(--clr-text-muted); }
.text-center { text-align: center; }
.mt-4 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1.5rem; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 3%; position: relative; }
.section-padding { padding: 7rem 0; }
.bg-light {
    background: linear-gradient(180deg, transparent 0%, rgba(13,17,26,0.6) 50%, transparent 100%);
    position: relative;
}
.bg-light::before {
    content: ''; position: absolute; left: 0; right: 0; top: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-glow), transparent);
}
.bg-light::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-glow), transparent);
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.7rem 1.4rem; border-radius: 8px; font-weight: 600; cursor: pointer;
    border: 1px solid transparent; transition: var(--transition); gap: 0.5rem; font-size: 0.95rem;
    position: relative; overflow: hidden; white-space: nowrap;
}
.btn-lg { padding: 0.95rem 2.2rem; font-size: 1.05rem; }
.btn-primary {
    background: var(--gradient-primary); color: #fff;
    box-shadow: 0 4px 20px -4px rgba(59,130,246,0.5);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px -4px rgba(59,130,246,0.7); }
.btn-primary::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.25) 50%, transparent 70%);
    transform: translateX(-100%); transition: transform 0.6s;
}
.btn-primary:hover::before { transform: translateX(100%); }

.btn-secondary {
    background: rgba(255,255,255,0.04); color: var(--clr-text);
    border-color: var(--clr-border-light); backdrop-filter: blur(10px);
}
.btn-secondary:hover {
    background: var(--clr-accent-light); color: var(--clr-accent);
    border-color: var(--clr-accent); transform: translateY(-2px);
}

.btn-outline {
    background: rgba(255,255,255,0.02); color: var(--clr-text);
    border-color: var(--clr-border-light); backdrop-filter: blur(10px);
}
.btn-outline:hover {
    border-color: var(--clr-accent);
    background-color: var(--clr-accent-light); color: var(--clr-accent);
}

/* ========== 顶栏 ========== */
.navbar { display: flex; justify-content: space-between; align-items: center; height: 72px; gap: 2rem; }
header {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    background-color: rgba(7, 9, 15, 0.7); backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid transparent; transition: var(--transition);
}
header.scrolled {
    border-bottom: 1px solid var(--clr-border);
    background-color: rgba(7, 9, 15, 0.85);
}
.logo img { height: 36px; width: auto; }
.nav-links { display: flex; gap: 1.75rem; align-items: center; }
.nav-link {
    font-size: 0.92rem; font-weight: 500; color: var(--clr-text-muted);
    display: inline-flex; align-items: center; gap: 0.35rem; position: relative;
}
.nav-link::after {
    content: ''; position: absolute; bottom: -6px; left: 0; width: 0; height: 2px;
    background: var(--gradient-primary); transition: width 0.25s;
}
.nav-link:hover { color: var(--clr-text); }
.nav-link:hover::after { width: 100%; }
.nav-link.nav-link-accent {
    padding: 0.35rem 0.8rem; border: 1px solid var(--clr-border-light);
    border-radius: 6px; color: var(--clr-accent); background: var(--clr-accent-light);
}
.nav-link.nav-link-accent::after { display: none; }
.nav-link.nav-link-accent:hover { border-color: var(--clr-accent); }
.nav-ext { font-size: 0.7rem; opacity: 0.7; }

.nav-actions { display: flex; gap: 1rem; align-items: center; }
.mobile-menu-btn { display: none; background: none; border: none; color: var(--clr-text); font-size: 1.5rem; cursor: pointer; }

.mobile-nav-overlay {
    position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    height: calc(100vh - 72px);
    height: calc(100dvh - 72px);
    background: rgba(7,9,15,0.96); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: none; flex-direction: column;
    padding: 1.75rem 1.5rem calc(2rem + env(safe-area-inset-bottom));
    z-index: 999;
    border-top: 1px solid var(--clr-border);
    overflow-y: auto; -webkit-overflow-scrolling: touch;
    gap: 0.25rem;
}
.mobile-nav-overlay.active { display: flex; }
.mobile-nav-overlay .nav-link {
    font-size: 1.05rem; font-weight: 500;
    padding: 0.95rem 0.5rem; margin: 0; display: flex; align-items: center;
    border-bottom: 1px solid var(--clr-border);
    color: var(--clr-text);
}
.mobile-nav-overlay .nav-link:last-of-type { border-bottom: none; }
.mobile-nav-overlay .nav-link::after { display: none; }
.mobile-nav-overlay .btn { margin-top: 1.25rem; padding: 0.85rem 1.5rem; }

/* ========== Hero（科技感动效） ========== */
.hero-section {
    padding-top: 180px; padding-bottom: 100px;
    position: relative; text-align: center;
    overflow: hidden;
    perspective: 1000px;
}
.hero-section::before {
    content: ''; position: absolute; inset: 0; z-index: 0;
    background:
        radial-gradient(ellipse 60% 40% at 50% 35%, rgba(59,130,246,0.18), transparent 60%),
        radial-gradient(ellipse 40% 30% at 80% 60%, rgba(34,211,238,0.12), transparent 60%);
    pointer-events: none;
}
/* 顶部光弧 */
.hero-arc {
    position: absolute; top: -260px; left: 50%; transform: translateX(-50%);
    width: 1100px; height: 600px;
    background: radial-gradient(ellipse at center, rgba(59,130,246,0.55) 0%, rgba(34,211,238,0.15) 35%, transparent 60%);
    filter: blur(40px); opacity: 0.55; pointer-events: none; z-index: 0;
    animation: arcShift 8s ease-in-out infinite alternate;
}
@keyframes arcShift {
    0% { transform: translateX(-52%) scale(1); opacity: 0.45; }
    100% { transform: translateX(-48%) scale(1.05); opacity: 0.65; }
}

/* 3D 透视网格地板 */
.hero-floor {
    position: absolute; left: 50%; bottom: -80px; transform: translateX(-50%);
    width: 200%; height: 460px;
    transform-style: preserve-3d;
    pointer-events: none; z-index: 0;
    mask-image: linear-gradient(to top, #000 30%, transparent 100%);
    -webkit-mask-image: linear-gradient(to top, #000 30%, transparent 100%);
}
.hero-floor-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(34,211,238,0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34,211,238,0.4) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: rotateX(72deg);
    transform-origin: 50% 100%;
    animation: gridScroll 6s linear infinite;
}
@keyframes gridScroll {
    from { background-position: 0 0; }
    to { background-position: 0 60px; }
}

/* 旋转圆环（中心透视感） */
.hero-rings {
    position: absolute; top: 28%; left: 50%; width: 540px; height: 540px;
    transform: translate(-50%, -50%) rotateX(60deg);
    pointer-events: none; z-index: 0; opacity: 0.55;
}
.ring {
    position: absolute; inset: 0; border: 1px solid rgba(59,130,246,0.35);
    border-radius: 50%;
}
.ring-1 { animation: ringSpin 18s linear infinite; }
.ring-2 {
    inset: 14%; border-color: rgba(34,211,238,0.4);
    border-style: dashed; animation: ringSpin 12s linear infinite reverse;
}
.ring-3 {
    inset: 30%; border-color: rgba(99,102,241,0.4);
    animation: ringSpin 9s linear infinite;
}
.ring-dot {
    position: absolute; top: 50%; left: 50%;
    width: 12px; height: 12px; border-radius: 50%;
    background: var(--clr-accent); box-shadow: 0 0 24px var(--clr-accent);
    transform: translate(-50%, -50%);
    animation: dotPulse 2.5s ease-in-out infinite;
}
@keyframes ringSpin { to { transform: rotate(360deg); } }
@keyframes dotPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.6); opacity: 0.4; }
}

/* 漂浮科技标签（视差） */
.hero-floats { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.float-chip {
    position: absolute; display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.45rem 0.9rem; font-size: 0.82rem; font-weight: 500;
    color: var(--clr-text); white-space: nowrap;
    background: linear-gradient(135deg, rgba(13,17,26,0.85), rgba(7,9,15,0.7));
    border: 1px solid var(--clr-border-light); border-radius: 8px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px -8px rgba(0,0,0,0.5);
    animation: floatY 6s ease-in-out infinite;
}
.float-chip i { color: var(--clr-accent); font-size: 0.85rem; }
.float-chip::before {
    content: ''; position: absolute; top: -1px; left: 12px; right: 12px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
    opacity: 0.7;
}
.float-1 { top: 10%; left: 6%;  animation-delay: 0s;  }
.float-2 { top: 14%; right: 6%; animation-delay: 1.2s; }
.float-3 { top: 32%; left: 3%;  animation-delay: 2.4s; }
.float-4 { top: 36%; right: 3%; animation-delay: 0.6s; }
.float-5 { top: 56%; left: 11%; animation-delay: 1.8s; }
.float-6 { top: 60%; right: 11%; animation-delay: 3s; }
.float-7 { top: 78%; left: 5%;  animation-delay: 2.1s; }
.float-8 { top: 80%; right: 6%; animation-delay: 0.9s; }
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* 数据光束（从顶部下落） */
.hero-beams { position: absolute; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.hero-beams span {
    position: absolute; top: -100px; width: 1px; height: 100px;
    background: linear-gradient(to bottom, transparent, var(--clr-accent), transparent);
    opacity: 0.5;
    animation: beamFall 4s linear infinite;
}
.hero-beams span:nth-child(1) { left: 18%; animation-delay: 0s; animation-duration: 3.5s; }
.hero-beams span:nth-child(2) { left: 38%; animation-delay: 1s; animation-duration: 4.5s; }
.hero-beams span:nth-child(3) { left: 64%; animation-delay: 2s; animation-duration: 3s; }
.hero-beams span:nth-child(4) { left: 86%; animation-delay: 0.5s; animation-duration: 5s; }
@keyframes beamFall {
    to { transform: translateY(140vh); opacity: 0; }
}

.hero-content { max-width: 860px; margin: 0 auto; position: relative; z-index: 2; }

/* 标题 glitch（轻量） */
.glitch { position: relative; display: inline-block; }
.glitch::before, .glitch::after {
    content: attr(data-text); position: absolute; inset: 0;
    background: var(--gradient-text);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    pointer-events: none;
}
.glitch::before { transform: translate(-2px, 0); opacity: 0.5; mix-blend-mode: screen;
    clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%);
    animation: glitchA 4s infinite steps(1);
}
.glitch::after { transform: translate(2px, 0); opacity: 0.4; mix-blend-mode: screen;
    clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
    animation: glitchB 4.4s infinite steps(1);
}
@keyframes glitchA {
    0%, 90%, 100% { transform: translate(0,0); }
    92% { transform: translate(-3px,1px); }
    94% { transform: translate(2px,-1px); }
}
@keyframes glitchB {
    0%, 88%, 100% { transform: translate(0,0); }
    90% { transform: translate(2px,1px); }
    96% { transform: translate(-2px,-1px); }
}
@media (prefers-reduced-motion: reduce) {
    .hero-floor-grid, .ring-1, .ring-2, .ring-3, .ring-dot,
    .float-chip, .hero-beams span, .hero-arc, .glitch::before, .glitch::after {
        animation: none !important;
    }
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.4rem 1rem; background: rgba(59, 130, 246, 0.08);
    color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.25); border-radius: 100px;
    font-size: 0.85rem; font-weight: 500; margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}
.badge-dot {
    width: 6px; height: 6px; border-radius: 50%; background: var(--clr-accent);
    box-shadow: 0 0 10px var(--clr-accent); animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.badge-version { color: var(--clr-accent); font-family: var(--font-mono); margin-left: 0.25rem; }

.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4.25rem); font-weight: 800;
    line-height: 1.1; margin-bottom: 1.75rem; letter-spacing: -1px;
}
.hero-description {
    font-size: 1.15rem; color: var(--clr-text-muted);
    max-width: 720px; margin: 0 auto 2.5rem; line-height: 1.7;
}
.hero-buttons { display: flex; gap: 1rem; justify-content: center; margin-bottom: 4.5rem; flex-wrap: wrap; }

/* 简约价值标 */
.hero-stats {
    display: flex; align-items: center; justify-content: center;
    gap: 0; max-width: 820px; margin: 0 auto;
    padding: 1.5rem 2.5rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.6), rgba(7,9,15,0.35));
    border: 1px solid var(--clr-border); border-radius: 16px;
    backdrop-filter: blur(16px);
}
.stat-item {
    display: flex; flex-direction: column; align-items: center;
    gap: 0.3rem; flex: 1; padding: 0.4rem 0;
}
.stat-number {
    font-size: 2rem; font-weight: 800; letter-spacing: -1px;
    background: var(--gradient-text); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
    line-height: 1.1;
}
.stat-unit {
    font-size: 0.55em; font-weight: 600;
    -webkit-text-fill-color: transparent;
    background: inherit; -webkit-background-clip: text; background-clip: text;
    opacity: 0.85;
}
.stat-label {
    font-size: 0.82rem; color: var(--clr-text-muted); font-weight: 500;
    letter-spacing: 0.5px;
}
.stat-divider {
    width: 1px; height: 36px;
    background: linear-gradient(180deg, transparent, var(--clr-border-light) 50%, transparent);
    flex-shrink: 0; margin: 0 0.5rem;
}

/* ========== 通用版块标题 ========== */
.section-header { margin-bottom: 4rem; text-align: center; }
.section-eyebrow {
    color: var(--clr-accent); font-family: var(--font-mono);
    font-size: 0.85rem; font-weight: 500; margin-bottom: 0.85rem;
    letter-spacing: 1.5px; text-transform: uppercase;
}
.section-title {
    font-size: clamp(1.75rem, 3.2vw, 2.4rem); font-weight: 700;
    margin-bottom: 1rem; letter-spacing: -0.5px;
}
.section-subtitle { color: var(--clr-text-muted); font-size: 1.05rem; max-width: 640px; margin: 0 auto; }

/* ========== 功能卡片 ========== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.25rem; }
.feature-card {
    background: linear-gradient(180deg, var(--clr-bg-alt), var(--clr-bg));
    border: 1px solid var(--clr-border); border-radius: 14px; padding: 2rem;
    transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-glow), transparent);
    opacity: 0; transition: opacity 0.3s;
}
.feature-card:hover {
    border-color: var(--clr-border-highlight); transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover .feature-icon {
    border-color: var(--clr-primary); color: #fff;
    background: var(--gradient-primary); box-shadow: 0 0 24px -4px var(--clr-primary);
}
.feature-corner {
    position: absolute; top: 0; right: 0; width: 36px; height: 36px;
    background: linear-gradient(135deg, transparent 50%, var(--clr-border) 50%);
    transition: var(--transition);
}
.feature-card:hover .feature-corner {
    background: linear-gradient(135deg, transparent 50%, var(--clr-accent) 50%);
}
.feature-icon {
    width: 52px; height: 52px;
    background: var(--clr-bg-elev); color: var(--clr-accent);
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    font-size: 1.35rem; margin-bottom: 1.4rem;
    border: 1px solid var(--clr-border-light); transition: var(--transition);
}
.feature-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.75rem; }
.feature-desc { color: var(--clr-text-muted); font-size: 0.95rem; line-height: 1.7; }

/* ========== 演示 Tabs ========== */
.demo-tabs {
    display: flex; gap: 0.5rem; margin-bottom: 0;
    border-bottom: 1px solid var(--clr-border);
    overflow-x: auto; overflow-y: hidden;
    -webkit-overflow-scrolling: touch; padding-bottom: 0;
    scrollbar-width: none;
}
.demo-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
    background: transparent; border: none; color: var(--clr-text-muted); font-size: 0.95rem;
    padding: 0.85rem 1.5rem; cursor: pointer; white-space: nowrap; font-weight: 500;
    transition: var(--transition); position: relative;
}
.tab-btn:hover { color: var(--clr-text); }
.tab-btn.active { color: var(--clr-text); }
.tab-btn.active::after {
    content: ''; position: absolute; bottom: -1px; left: 0; width: 100%; height: 2px;
    background: var(--gradient-primary);
    box-shadow: 0 0 10px var(--clr-primary);
}

.tab-pane {
    display: none;
    background: linear-gradient(180deg, var(--clr-bg-alt), var(--clr-bg));
    border: 1px solid var(--clr-border); border-top: none;
    border-radius: 0 0 12px 12px; padding: 2rem;
}
.tab-pane.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
.demo-desc { font-size: 1rem; color: var(--clr-text-muted); margin-bottom: 1.5rem; line-height: 1.7; }

/* ========== 数据表格 ========== */
.data-table { width: 100%; border-collapse: collapse; min-width: 600px; }
.table-scroll {
    overflow-x: auto; border: 1px solid var(--clr-border); border-radius: 8px;
    scrollbar-width: thin; scrollbar-color: var(--clr-border-light) transparent;
}
.table-scroll::-webkit-scrollbar { height: 6px; }
.table-scroll::-webkit-scrollbar-thumb { background: var(--clr-border-light); border-radius: 4px; }

.data-table th, .data-table td {
    padding: 0.95rem 1.2rem; text-align: left; border-bottom: 1px solid var(--clr-border);
}
.data-table tbody tr { transition: background 0.2s; }
.data-table tbody tr:hover { background: rgba(59,130,246,0.04); }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table th {
    color: var(--clr-text-muted); font-weight: 500; background: var(--clr-bg);
    font-size: 0.85rem; letter-spacing: 0.5px; text-transform: uppercase;
}
.data-table td a { color: var(--clr-accent); font-family: var(--font-mono); font-size: 0.9rem; }
.data-table td a:hover { text-decoration: underline; }
.data-table td { color: var(--clr-text); font-size: 0.93rem; }

.info-box {
    background: rgba(13,17,26,0.5);
    border: 1px solid var(--clr-border);
    padding: 1.4rem 1.5rem; border-radius: 12px; margin-top: 1.5rem;
}
.info-box h4 {
    display: inline-flex; align-items: center; gap: 0.5rem;
    margin: 0 0 0.85rem; color: var(--clr-text); font-size: 0.98rem; font-weight: 600;
}
.info-box h4::before {
    content: ''; display: inline-block;
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--clr-accent); box-shadow: 0 0 8px var(--clr-accent);
}
.info-list {
    list-style: none; padding: 0; margin: 0;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.5rem 1.5rem;
}
.info-list li {
    display: flex; align-items: flex-start; gap: 0.55rem;
    color: var(--clr-text-muted); font-size: 0.9rem; line-height: 1.7;
}
.info-list li i {
    color: var(--clr-accent); font-size: 0.85rem;
    margin-top: 0.32rem; flex-shrink: 0;
}
.info-list li b { color: var(--clr-text); font-weight: 600; margin-right: 0.2rem; }

/* ========== 价格卡 ========== */
.pricing-cards-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem; align-items: stretch;
}
.pricing-card {
    background: linear-gradient(180deg, var(--clr-bg-alt) 0%, var(--clr-bg) 100%);
    border: 1px solid var(--clr-border); border-radius: 16px;
    padding: 2rem 1.4rem 1.75rem;
    display: flex; flex-direction: column;
    transition: var(--transition); position: relative; overflow: hidden;
}
.pricing-card::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(59,130,246,0.1), transparent 60%);
    opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
/* 卡片顶部装饰条 */
.pricing-card > .card-header::before {
    content: ''; position: absolute; top: -2rem; left: 50%; transform: translateX(-50%);
    width: 60%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
    opacity: 0.3; transition: opacity 0.3s;
}
.pricing-card:hover {
    transform: translateY(-6px); border-color: var(--clr-border-light);
    box-shadow: 0 12px 36px -10px rgba(0,0,0,0.7), 0 0 0 1px var(--clr-border-light);
}
.pricing-card:hover::before { opacity: 1; }
.pricing-card:hover > .card-header::before { opacity: 1; }

.pricing-card.highlight {
    background:
        linear-gradient(180deg, rgba(13,17,26,0.9), rgba(7,9,15,0.9)),
        linear-gradient(135deg, rgba(59,130,246,0.15), rgba(34,211,238,0.08));
    background-blend-mode: overlay, normal;
    border-color: transparent;
    box-shadow: 0 12px 50px -12px rgba(59,130,246,0.5);
    transform: translateY(-10px);
}
.pricing-card.highlight::after {
    content: ''; position: absolute; inset: 0; border-radius: 16px; padding: 1.5px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent), var(--clr-primary));
    background-size: 200% 200%;
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
    animation: gradientShift 4s linear infinite;
}
@keyframes gradientShift { to { background-position: 200% 0%; } }
.pricing-card.highlight:hover { transform: translateY(-14px); }
.pricing-card.highlight > .card-header::before { opacity: 1; background: linear-gradient(90deg, transparent, #fff, transparent); }

.pricing-badge {
    position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    background: var(--gradient-primary); color: white; font-size: 0.72rem;
    padding: 0.35rem 1.2rem; border-radius: 0 0 10px 10px; font-weight: 700;
    letter-spacing: 1px; z-index: 3;
    box-shadow: 0 4px 14px -2px rgba(59,130,246,0.6);
}
.pricing-badge::before, .pricing-badge::after {
    content: ''; position: absolute; top: 0; width: 6px; height: 6px;
    background: var(--clr-primary);
}
.pricing-badge::before { left: -6px; clip-path: polygon(100% 0, 100% 100%, 0 100%); }
.pricing-badge::after { right: -6px; clip-path: polygon(0 0, 100% 100%, 0 100%); }

.card-header {
    text-align: center; margin-bottom: 1.5rem;
    padding-bottom: 1.5rem; padding-top: 0.75rem;
    border-bottom: 1px dashed var(--clr-border);
    position: relative;
}
.pricing-card.highlight .card-header { border-bottom-color: rgba(59,130,246,0.3); }

.card-header h3 {
    font-size: 1.35rem; font-weight: 700; margin-bottom: 0.5rem;
    letter-spacing: 1px; color: var(--clr-text);
}
.card-tagline {
    display: inline-block; font-size: 0.72rem;
    color: var(--clr-accent);
    background: var(--clr-accent-light);
    border: 1px solid rgba(34,211,238,0.25);
    padding: 0.2rem 0.75rem;
    border-radius: 100px;
    margin-bottom: 1.2rem;
    font-weight: 500; letter-spacing: 0.5px;
}
.pricing-card.highlight .card-tagline {
    color: #fff; background: var(--gradient-primary); border-color: transparent;
    box-shadow: 0 4px 12px -4px rgba(59,130,246,0.5);
}

/* 价格区：货币符号 / 数字 / 单位 分块展示 */
.card-price {
    margin: 0.4rem 0 0.85rem;
    display: flex; align-items: baseline; justify-content: center; gap: 0.18rem;
    font-family: var(--font-mono); line-height: 1;
}
.card-price::before {
    content: '¥'; font-size: 1.2rem; font-weight: 600;
    color: var(--clr-text-muted); align-self: flex-start; margin-top: 0.4rem;
}
.card-price::after {
    content: '元'; font-size: 0.78rem; color: var(--clr-text-muted);
    font-weight: 500; font-family: var(--font-main); align-self: flex-end; margin-bottom: 0.4rem;
}
.card-price {
    font-size: 2.85rem; font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.pricing-card.highlight .card-price { filter: drop-shadow(0 4px 16px rgba(59,130,246,0.4)); }

.card-subtext {
    color: var(--clr-text-muted); font-size: 0.8rem;
    display: flex; align-items: center; justify-content: center; gap: 0.4rem;
    margin-bottom: 0.3rem;
}
.card-subtext::before {
    content: ''; width: 4px; height: 4px; border-radius: 50%;
    background: var(--clr-text-dim);
}

.pricing-features {
    flex: 1; display: flex; flex-direction: column; gap: 0.65rem;
    position: relative; z-index: 1; padding-top: 0.25rem;
}
.pricing-features li {
    display: flex; align-items: center; gap: 0.6rem;
    color: var(--clr-text); font-size: 0.86rem; line-height: 1.4;
    padding: 0.1rem 0;
}
.pricing-features li i {
    font-size: 0.78rem; flex-shrink: 0;
    width: 16px; text-align: center;
}

.feat-yes > i { color: var(--clr-accent); }
.feat-no { color: var(--clr-text-dim) !important; opacity: 0.55; }
.feat-no .feat-text { text-decoration: line-through; }
.feat-no > i { color: var(--clr-text-dim); }

.feat-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feat-val {
    flex-shrink: 0;
    font-weight: 600; color: var(--clr-accent); font-size: 0.74rem;
    background: var(--clr-accent-light); padding: 0.12rem 0.55rem;
    border-radius: 4px; margin-left: auto; text-align: right; white-space: nowrap;
    border: 1px solid rgba(34,211,238,0.2);
    font-family: var(--font-mono); letter-spacing: -0.2px;
}

/* 版本说明（移到 promo 之前） */
.version-note {
    margin: 1.5rem auto 0;
    padding: 0; max-width: 900px;
    font-size: 0.82rem; color: var(--clr-text-dim);
    text-align: center; line-height: 1.7;
}
.version-note i { color: var(--clr-text-dim); margin-right: 0.35rem; opacity: 0.7; }

/* 服务费优惠条 */
.promo-banner {
    position: relative; overflow: hidden;
    margin-top: 1.5rem; padding: 2rem 2.25rem;
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(59,130,246,0.1) 0%, rgba(34,211,238,0.06) 100%),
        rgba(13,17,26,0.9);
    border: 1px solid transparent;
    display: grid;
    grid-template-columns: minmax(220px, 1fr) 2fr auto;
    align-items: center;
    gap: 2rem;
}
.promo-banner::before {
    content: ''; position: absolute; inset: 0; border-radius: 16px; padding: 1px;
    background: linear-gradient(120deg, var(--clr-primary), var(--clr-accent), var(--clr-primary));
    background-size: 200% 100%;
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    pointer-events: none;
    animation: promoBorder 5s linear infinite;
}
@keyframes promoBorder { to { background-position: -200% 0; } }
.promo-bg {
    position: absolute; right: -160px; top: 50%; transform: translateY(-50%);
    width: 480px; height: 480px; pointer-events: none;
    background: radial-gradient(circle, rgba(34,211,238,0.18) 0%, transparent 60%);
}

.promo-head { position: relative; z-index: 1; }
.promo-tag {
    display: inline-flex; align-items: center; gap: 0.45rem;
    font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700;
    padding: 0.3rem 0.75rem;
    color: var(--clr-accent); background: var(--clr-accent-light);
    border: 1px solid rgba(34,211,238,0.3);
    border-radius: 100px; letter-spacing: 1.2px;
    margin-bottom: 0.85rem;
}
.tag-blink {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--clr-accent); box-shadow: 0 0 10px var(--clr-accent);
    animation: pulse 1.6s infinite;
}
.promo-headline {
    font-size: 1.6rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.5px;
    background: var(--gradient-text);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    margin: 0;
}
.promo-headline .hl {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.promo-list {
    list-style: none; padding: 0; margin: 0;
    display: grid; grid-template-columns: 1fr;
    gap: 0.7rem; position: relative; z-index: 1;
}
.promo-list li {
    display: flex; align-items: flex-start; gap: 0.7rem;
    color: var(--clr-text); font-size: 0.95rem; line-height: 1.65;
}
.li-icon {
    flex-shrink: 0; color: var(--clr-accent); font-size: 1rem;
    margin-top: 0.18rem;
}
.li-text { flex: 1; min-width: 0; }
.promo-cta { flex-shrink: 0; position: relative; z-index: 1; align-self: center; }

/* ========== 资质认证 ========== */
.credentials-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.1rem;
    max-width: 1320px; margin: 0 auto;
}
@media (max-width: 1180px) {
    .credentials-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .credentials-grid .credential-card.cred-extra { display: none; }
}
@media (max-width: 900px) {
    .credentials-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .credentials-grid .credential-card.cred-extra { display: block; }
}
@media (max-width: 520px) {
    .credentials-grid { grid-template-columns: 1fr; }
}
.credential-card {
    background: linear-gradient(180deg, var(--clr-bg-alt), var(--clr-bg));
    border: 1px solid var(--clr-border); border-radius: 14px;
    padding: 1.25rem; transition: var(--transition);
    display: flex; flex-direction: column; gap: 1.1rem; cursor: pointer;
    position: relative; overflow: hidden;
}
.credential-card::after {
    content: ''; position: absolute; inset: 0; border-radius: 14px; padding: 1px;
    background: linear-gradient(135deg, transparent 30%, var(--clr-border-glow), transparent 70%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.credential-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.credential-card:hover::after { opacity: 1; }
.credential-img-wrap {
    position: relative; border-radius: 10px; overflow: hidden;
    background: #fff; aspect-ratio: 3 / 4;
    border: 1px solid var(--clr-border);
}
.credential-img-wrap img {
    width: 100%; height: 100%; object-fit: contain; object-position: center;
    transition: transform 0.4s;
}
.credential-card:hover .credential-img-wrap img { transform: scale(1.04); }
.credential-overlay {
    position: absolute; inset: 0; background: rgba(7,9,15,0.7);
    color: #fff; display: flex; align-items: center; justify-content: center;
    gap: 0.5rem; font-size: 0.9rem; opacity: 0;
    transition: opacity 0.3s; backdrop-filter: blur(4px);
}
.credential-card:hover .credential-overlay { opacity: 1; }
.credential-info { padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.credential-tag {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.22rem 0.65rem; border-radius: 100px;
    font-size: 0.72rem; font-weight: 600; align-self: flex-start;
}
.credential-tag.tag-soft {
    background: var(--clr-accent-light); color: var(--clr-accent);
    border: 1px solid rgba(34,211,238,0.25);
}
.credential-tag.tag-mark {
    background: rgba(245, 158, 11, 0.1); color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}
.credential-info h3 {
    font-size: 1.02rem; font-weight: 700; line-height: 1.4;
    color: var(--clr-text);
}
.reg-mark {
    display: inline-block; font-size: 0.7em;
    color: var(--clr-accent); vertical-align: super;
    margin: 0 1px; font-weight: 600;
}
.credential-info p {
    color: var(--clr-text-muted); font-size: 0.84rem; line-height: 1.65;
    flex: 1;
}
.credential-no {
    display: flex; align-items: center; gap: 0.5rem;
    margin-top: 0.25rem; padding-top: 0.65rem;
    border-top: 1px dashed var(--clr-border);
    font-size: 0.78rem;
}
.credential-no span { color: var(--clr-text-muted); }
.credential-no code {
    font-family: var(--font-mono); color: var(--clr-accent);
    background: var(--clr-accent-light); padding: 0.1rem 0.45rem;
    border-radius: 4px; border: 1px solid rgba(34,211,238,0.2);
    font-size: 0.78rem; letter-spacing: 0.5px;
}

/* ========== Lightbox ========== */
.lightbox {
    position: fixed; inset: 0; z-index: 2000;
    background: rgba(7,9,15,0.92); backdrop-filter: blur(8px);
    display: none; align-items: center; justify-content: center;
    padding: 4rem 2rem;
}
.lightbox.active { display: flex; animation: fadeIn 0.25s ease; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; box-shadow: 0 12px 60px rgba(0,0,0,0.6); }
.lightbox-close {
    position: absolute; top: 1.5rem; right: 1.5rem; width: 44px; height: 44px;
    background: rgba(255,255,255,0.08); border: 1px solid var(--clr-border-light);
    color: #fff; border-radius: 50%; font-size: 1rem; cursor: pointer;
    transition: var(--transition);
}
.lightbox-close:hover { background: var(--clr-primary); border-color: var(--clr-primary); }

/* ========== 联系区 · 企业级 ========== */
.ct-panel {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0;
    background: linear-gradient(135deg, rgba(13,17,26,0.92), rgba(7,9,15,0.92));
    border: 1px solid var(--clr-border); border-radius: 20px;
    overflow: hidden; position: relative;
}
.ct-panel::before {
    content: ''; position: absolute; inset: 0; border-radius: 20px; padding: 1px;
    background: linear-gradient(135deg, var(--clr-primary), transparent 40%, transparent 60%, var(--clr-accent));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.ct-left {
    padding: 2.75rem 2.5rem; display: flex; flex-direction: column; justify-content: center;
    border-right: 1px solid var(--clr-border);
}
.ct-heading {
    font-size: 1.55rem; font-weight: 800; line-height: 1.35;
    margin: 0 0 0.85rem; letter-spacing: -0.3px;
}
.ct-desc {
    color: var(--clr-text-muted); font-size: 0.92rem; line-height: 1.75;
    margin: 0 0 1.5rem;
}
.ct-rows { display: flex; flex-direction: column; gap: 0.7rem; margin-bottom: 1.75rem; }
.ct-row {
    display: flex; align-items: center; gap: 0.85rem;
    padding: 0.7rem 0.9rem;
    background: rgba(255,255,255,0.02); border: 1px solid var(--clr-border);
    border-radius: 10px; transition: var(--transition);
}
.ct-row:hover { border-color: var(--clr-border-light); }
.ct-row > i {
    flex-shrink: 0; width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gradient-primary); color: #fff;
    border-radius: 8px; font-size: 0.9rem;
    box-shadow: 0 4px 12px -4px rgba(59,130,246,0.45);
}
.ct-row div { display: flex; flex-direction: column; }
.ct-row span { font-size: 0.72rem; color: var(--clr-text-muted); letter-spacing: 0.5px; margin-bottom: 1px; }
.ct-row strong {
    font-family: var(--font-mono); font-size: 1rem; color: var(--clr-text); font-weight: 700;
    letter-spacing: 0.3px;
}
.ct-cta { align-self: flex-start; }

.ct-right {
    display: flex; align-items: center; justify-content: center; gap: 1.5rem;
    padding: 2.75rem 2rem;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(59,130,246,0.04), transparent);
}
.ct-qr {
    display: flex; flex-direction: column; align-items: center; text-align: center; gap: 0.55rem;
}
.ct-qr-img {
    padding: 5px; background: #fff; border-radius: 10px;
    border: 1px solid var(--clr-border-light);
    position: relative;
    transition: var(--transition);
}
.ct-qr-img::before, .ct-qr-img::after {
    content: ''; position: absolute; width: 12px; height: 12px;
}
.ct-qr-img::before {
    top: -1px; left: -1px;
    border-top: 2px solid var(--clr-accent); border-left: 2px solid var(--clr-accent);
    border-top-left-radius: 8px;
}
.ct-qr-img::after {
    bottom: -1px; right: -1px;
    border-bottom: 2px solid var(--clr-accent); border-right: 2px solid var(--clr-accent);
    border-bottom-right-radius: 8px;
}
.ct-qr:hover .ct-qr-img { transform: translateY(-3px); box-shadow: 0 8px 24px -8px rgba(34,211,238,0.3); }
.ct-qr-img img { width: 120px; height: 120px; border-radius: 6px; display: block; }
.ct-qr strong { font-size: 0.88rem; color: var(--clr-text); font-weight: 600; }
.ct-qr span { font-size: 0.74rem; color: var(--clr-text-muted); }
.contact-row {
    display: flex; align-items: center; gap: 1rem;
    padding: 0.95rem 1.1rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.7), rgba(7,9,15,0.5));
    border: 1px solid var(--clr-border); border-radius: 12px;
    transition: var(--transition);
}
.contact-row:hover { border-color: var(--clr-border-light); transform: translateX(3px); }
.contact-row-icon {
    flex-shrink: 0; width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gradient-primary); color: #fff;
    border-radius: 11px; font-size: 1.1rem;
    box-shadow: 0 6px 16px -6px rgba(59,130,246,0.5);
}
.contact-row-text { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.contact-row-text span { font-size: 0.78rem; color: var(--clr-text-muted); letter-spacing: 0.5px; margin-bottom: 2px; }
.contact-row-text strong {
    font-family: var(--font-mono); font-size: 1.15rem;
    color: var(--clr-text); font-weight: 700;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    letter-spacing: 0.3px;
}

/* 双二维码 */
.qr-row {
    display: flex; gap: 1.25rem; flex-shrink: 0;
}
.qr-card {
    flex: 0 0 auto;
    display: flex; flex-direction: column; align-items: center;
    padding: 1.25rem 1.1rem 1rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.7), rgba(7,9,15,0.5));
    border: 1px solid var(--clr-border-light);
    border-radius: 14px; position: relative;
    transition: var(--transition);
    min-width: 180px;
}
.qr-card:hover { transform: translateY(-4px); border-color: var(--clr-accent); box-shadow: 0 12px 30px -8px rgba(34,211,238,0.35); }
.qr-card-head {
    font-size: 0.82rem; font-weight: 600;
    margin: 0 0 0.85rem;
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.3rem 0.85rem;
    background: var(--gradient-primary); color: #fff;
    border-radius: 100px;
    box-shadow: 0 4px 14px -4px rgba(59,130,246,0.55);
    align-self: center;
}
.qr-card-head i { font-size: 0.78rem; }
.qr-frame {
    padding: 6px; background: #fff;
    border: 1px solid var(--clr-border-light); border-radius: 10px;
    margin-bottom: 0.75rem; position: relative;
    display: block; align-self: center;
}
.qr-frame::before, .qr-frame::after {
    content: ''; position: absolute; width: 14px; height: 14px;
}
.qr-frame::before {
    top: -1px; left: -1px;
    border-top: 2px solid var(--clr-accent); border-left: 2px solid var(--clr-accent);
    border-top-left-radius: 8px;
}
.qr-frame::after {
    bottom: -1px; right: -1px;
    border-bottom: 2px solid var(--clr-accent); border-right: 2px solid var(--clr-accent);
    border-bottom-right-radius: 8px;
}
.qr-frame img {
    width: 144px; height: 144px; border-radius: 4px; display: block;
}
.qr-card-foot { font-size: 0.78rem; color: var(--clr-text-muted); margin: 0; align-self: center; }

/* ========== 页脚 ========== */
/* ========== 核心能力 · 平台价值 ========== */
.capabilities-section { position: relative; }
.cap-tabs {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 0.35rem; margin: 0 auto 2.25rem; max-width: 1100px;
    padding: 0.4rem;
    background: rgba(13,17,26,0.5); border: 1px solid var(--clr-border);
    border-radius: 18px;
}
.cap-tab {
    display: inline-flex; align-items: center; gap: 0.45rem;
    padding: 0.55rem 0.95rem;
    background: transparent; border: 1px solid transparent; cursor: pointer;
    color: var(--clr-text-muted); font-size: 0.86rem; font-weight: 500;
    border-radius: 12px; transition: var(--transition);
    white-space: nowrap;
}
.cap-tab i { font-size: 0.82rem; }
.cap-tab:hover { color: var(--clr-text); background: rgba(255,255,255,0.04); }
.cap-tab.active {
    background: var(--gradient-primary); color: #fff;
    box-shadow: 0 6px 20px -6px rgba(59,130,246,0.55);
}

.cap-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}
.cap-card {
    padding: 1.6rem 1.4rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.7), rgba(7,9,15,0.5));
    border: 1px solid var(--clr-border); border-radius: 14px;
    transition: var(--transition);
    position: relative; overflow: hidden;
}
.cap-card::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0;
    width: 3px; background: var(--gradient-primary);
    transform: scaleY(0); transform-origin: top; transition: transform 0.4s;
}
.cap-card:hover {
    transform: translateY(-4px); border-color: var(--clr-accent);
    box-shadow: 0 14px 40px -14px rgba(34,211,238,0.3);
}
.cap-card:hover::before { transform: scaleY(1); }
.cap-card.cap-hidden { display: none; }
.cap-icon {
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    background: var(--clr-accent-light); color: var(--clr-accent);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: 11px; font-size: 1.1rem; margin-bottom: 0.95rem;
}
.cap-card h3 {
    font-size: 1.05rem; font-weight: 700; margin: 0 0 0.5rem; color: var(--clr-text);
}
.cap-card p { color: var(--clr-text-muted); font-size: 0.88rem; line-height: 1.7; margin: 0; }
.cap-card p strong { color: var(--clr-accent); font-weight: 700; }
.cap-foot {
    margin-top: 1.75rem; text-align: center;
    color: var(--clr-text-muted); font-size: 0.88rem;
}
.cap-foot i { color: var(--clr-accent); margin-right: 0.4rem; }
.cap-foot a { color: var(--clr-accent); border-bottom: 1px dashed currentColor; }

/* ========== 通用权益卡（不限域名 / 独立部署 等） ========== */
.universal-rights {
    margin-top: 2rem;
    display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem;
}
.ur-item {
    display: flex; align-items: center; gap: 0.85rem;
    padding: 1rem 1.1rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.7), rgba(7,9,15,0.4));
    border: 1px solid var(--clr-border); border-radius: 12px;
    transition: var(--transition);
}
.ur-item:hover { border-color: var(--clr-accent); transform: translateY(-2px); }
.ur-icon {
    flex-shrink: 0; width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: var(--clr-accent-light); color: var(--clr-accent);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: 10px; font-size: 1rem;
}
.ur-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.ur-text strong { font-size: 0.92rem; color: var(--clr-text); font-weight: 600; }
.ur-text span { font-size: 0.78rem; color: var(--clr-text-muted); line-height: 1.4; }

/* promo-banner 增强 */
.promo-sub {
    color: var(--clr-text-muted); font-size: 0.88rem;
    margin: 0.5rem 0 0; letter-spacing: 0.3px;
}
.li-tag {
    display: inline-flex; align-items: center; gap: 0.35rem;
    font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700;
    padding: 0.18rem 0.55rem; margin-right: 0.4rem;
    color: #fbbf24; background: rgba(251,191,36,0.1);
    border: 1px solid rgba(251,191,36,0.35); border-radius: 4px;
    letter-spacing: 1px; vertical-align: 1px;
}
.li-tag .tag-blink { background: #fbbf24; box-shadow: 0 0 8px #fbbf24; }

/* ========== 开源底蕴（HotGo） ========== */
.opensource-section {
    position: relative; overflow: hidden;
    background:
        radial-gradient(circle at 20% 30%, rgba(59,130,246,0.08), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(34,211,238,0.06), transparent 50%);
}
.os-wrapper {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 3rem; align-items: center;
    background: linear-gradient(135deg, rgba(13,17,26,0.85), rgba(7,9,15,0.7));
    border: 1px solid var(--clr-border); border-radius: 20px;
    padding: 3rem; position: relative; overflow: hidden;
}
.os-wrapper::before {
    content: ''; position: absolute; inset: 0; border-radius: 20px; padding: 1px;
    background: linear-gradient(135deg, var(--clr-primary), transparent 40%, transparent 60%, var(--clr-accent));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.os-title {
    text-align: left;
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    margin: 0.4rem 0 1rem;
    line-height: 1.3;
}
.grad-text {
    background: var(--gradient-text);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    font-family: var(--font-mono); font-weight: 800; letter-spacing: -1px;
}
.os-lead {
    color: var(--clr-text-muted); font-size: 1rem; line-height: 1.85;
    margin-bottom: 1.5rem;
}
.os-lead a { color: var(--clr-accent); border-bottom: 1px dashed currentColor; }
.os-points {
    list-style: none; padding: 0; margin: 0 0 1.75rem;
    display: grid; gap: 0.55rem;
}
.os-points li {
    display: flex; align-items: center; gap: 0.6rem;
    color: var(--clr-text); font-size: 0.93rem;
}
.os-points i { color: var(--clr-accent); font-size: 0.95rem; flex-shrink: 0; }
.os-cta { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.os-cta .btn { font-size: 0.9rem; padding: 0.65rem 1.2rem; }

.os-stats {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem; margin-bottom: 1.25rem;
}
.os-stat {
    padding: 1.1rem 1rem;
    background: rgba(13,17,26,0.6); border: 1px solid var(--clr-border);
    border-radius: 12px; text-align: center;
    transition: var(--transition);
}
.os-stat:hover { border-color: var(--clr-accent); transform: translateY(-3px); }
.stat-value {
    font-family: var(--font-mono); font-size: 1.85rem; font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    letter-spacing: -1px; margin-bottom: 0.3rem;
}
.stat-label {
    font-size: 0.78rem; color: var(--clr-text-muted);
    display: inline-flex; align-items: center; gap: 0.35rem;
}
.stat-label i { color: var(--clr-accent); }
.os-stack {
    display: flex; flex-wrap: wrap; gap: 0.45rem;
    padding: 1rem; border-radius: 12px;
    background: rgba(13,17,26,0.4); border: 1px dashed var(--clr-border);
}
.os-chip {
    font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
    padding: 0.3rem 0.65rem; color: var(--clr-text-muted);
    background: rgba(255,255,255,0.03); border: 1px solid var(--clr-border-light);
    border-radius: 6px; letter-spacing: 0.3px;
}

/* ========== 授权商 · 合作特权 ========== */
.partner-section { background: rgba(7,9,15,0.3); }
.partner-grid {
    display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem; margin-top: 0.5rem;
}
.partner-card {
    padding: 1.75rem 1.5rem;
    background: linear-gradient(180deg, rgba(13,17,26,0.7), rgba(7,9,15,0.5));
    border: 1px solid var(--clr-border); border-radius: 14px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.partner-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0); transform-origin: left; transition: transform 0.4s;
}
.partner-card:hover {
    transform: translateY(-4px); border-color: var(--clr-accent);
    box-shadow: 0 16px 40px -12px rgba(34,211,238,0.25);
}
.partner-card:hover::before { transform: scaleX(1); }
.partner-icon {
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: var(--clr-accent-light); color: var(--clr-accent);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: 12px; font-size: 1.2rem; margin-bottom: 1rem;
}
.partner-card h3 {
    font-size: 1.08rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--clr-text);
}
.partner-card p { color: var(--clr-text-muted); font-size: 0.9rem; line-height: 1.7; margin: 0; }
.partner-cta {
    margin-top: 2.25rem; padding: 1.75rem 2rem;
    background: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(34,211,238,0.04));
    border: 1px solid var(--clr-border); border-radius: 14px;
    display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
    flex-wrap: wrap;
}
.partner-cta p { margin: 0; color: var(--clr-text); font-size: 0.98rem; }

/* ========== Footer · 高端多列 ========== */
.footer {
    position: relative; overflow: hidden;
    border-top: 1px solid var(--clr-border);
    background: linear-gradient(180deg, rgba(7,9,15,0.5) 0%, rgba(3,5,9,0.95) 100%);
    color: var(--clr-text-muted); font-size: 0.88rem;
    padding: 4rem 0 1.5rem;
}
.footer-glow {
    position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: 80%; height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
    opacity: 0.5; pointer-events: none;
}
.footer::before {
    content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
    width: 800px; height: 800px; pointer-events: none;
    background: radial-gradient(circle, rgba(59,130,246,0.06) 0%, transparent 60%);
}
.footer .container { position: relative; z-index: 1; }

.footer-top {
    display: grid; grid-template-columns: 1.3fr 2.5fr;
    gap: 3rem; padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--clr-border);
}
.footer-brand { max-width: 380px; }
.footer-brand .footer-logo img { height: 36px; filter: none; opacity: 1; margin-bottom: 1rem; }
.footer-tagline {
    font-size: 0.95rem; font-weight: 600; color: var(--clr-text);
    margin: 0 0 0.6rem;
}
.footer-desc {
    font-size: 0.85rem; line-height: 1.75; color: var(--clr-text-muted);
    margin: 0 0 1.25rem;
}
.footer-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.footer-badge {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--clr-border-light); border-radius: 100px;
    font-size: 0.74rem; color: var(--clr-text-muted); letter-spacing: 0.3px;
}
.footer-badge i { color: var(--clr-accent); font-size: 0.78rem; }

.footer-cols {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
}
.footer-col h4 {
    font-size: 0.82rem; font-weight: 700; color: var(--clr-text);
    margin: 0 0 1rem; letter-spacing: 1px; text-transform: uppercase;
    font-family: var(--font-mono);
    position: relative; padding-bottom: 0.5rem;
}
.footer-col h4::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 24px; height: 2px; background: var(--gradient-primary);
    border-radius: 2px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.55rem; }
.footer-col a {
    color: var(--clr-text-muted); font-size: 0.86rem;
    transition: var(--transition); display: inline-flex; align-items: center; gap: 0.35rem;
}
.footer-col a:hover { color: var(--clr-accent); transform: translateX(2px); }
.footer-contact li {
    color: var(--clr-text-muted); font-size: 0.86rem;
    display: inline-flex; align-items: center; gap: 0.55rem;
}
.footer-contact i { color: var(--clr-accent); width: 14px; flex-shrink: 0; }
.footer-cta {
    margin-top: 0.4rem;
    padding: 0.5rem 0.9rem; background: var(--clr-accent-light);
    border: 1px solid rgba(34,211,238,0.25); border-radius: 8px;
    color: var(--clr-accent) !important; font-weight: 600; font-size: 0.84rem;
}
.footer-cta:hover { background: var(--gradient-primary); color: #fff !important; border-color: transparent; transform: none; }

.footer-bottom {
    padding-top: 1.5rem;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 1rem;
    font-size: 0.8rem; color: var(--clr-text-dim);
}
.footer-meta { display: inline-flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.footer-meta sup { color: var(--clr-accent); font-size: 0.6em; vertical-align: super; }
.footer-sep { color: var(--clr-border-light); }
.footer a { color: var(--clr-text-muted); }
.footer a:hover { color: var(--clr-accent); }

/* ========== 法律协议页 ========== */
.legal-body { padding-top: 72px; }
.legal-main { padding: 4rem 0 6rem; position: relative; }
.legal-article {
    max-width: 880px;
}
.legal-header { text-align: center; margin-bottom: 3.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--clr-border); }
.legal-header h1 {
    font-size: clamp(1.85rem, 4vw, 2.6rem);
    font-weight: 800; letter-spacing: -0.5px;
    margin: 0.6rem 0 1rem;
    background: var(--gradient-text);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.legal-meta { color: var(--clr-text-muted); font-size: 0.9rem; font-family: var(--font-mono); }

.legal-toc {
    background: rgba(13,17,26,0.5);
    border: 1px solid var(--clr-border);
    border-radius: 12px; padding: 1.5rem 1.75rem; margin-bottom: 3rem;
}
.toc-title {
    display: inline-flex; align-items: center; gap: 0.5rem;
    font-size: 0.78rem; font-weight: 700; letter-spacing: 1px;
    color: var(--clr-text-muted); margin-bottom: 1rem;
    font-family: var(--font-mono); text-transform: uppercase;
}
.toc-title::before {
    content: ''; display: inline-block;
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--clr-accent); box-shadow: 0 0 8px var(--clr-accent);
}
.toc-title i { display: none; }
.legal-toc ol {
    list-style: none; padding: 0; margin: 0;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.5rem 1.25rem;
    counter-reset: toc;
}
.legal-toc ol li {
    counter-increment: toc;
    margin: 0; font-size: 0.9rem;
    display: flex; align-items: baseline; gap: 0.55rem;
}
.legal-toc ol li::before {
    content: counter(toc, decimal-leading-zero);
    font-family: var(--font-mono); font-size: 0.78rem;
    color: var(--clr-text-dim); flex-shrink: 0;
    min-width: 22px;
}
.legal-toc ol a { color: var(--clr-text-muted); transition: var(--transition); }
.legal-toc ol a:hover { color: var(--clr-accent); }

.legal-section { margin-bottom: 3rem; scroll-margin-top: 90px; }
.legal-section h2 {
    font-size: 1.4rem; font-weight: 700; color: var(--clr-text);
    margin: 0 0 1.5rem; padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--clr-border);
    letter-spacing: -0.2px;
}
.legal-section h3 {
    font-size: 1.05rem; font-weight: 600; color: var(--clr-text);
    margin: 1.75rem 0 0.85rem;
    display: inline-flex; align-items: center; gap: 0.5rem;
}
.legal-section h3::before {
    content: ''; display: inline-block;
    width: 4px; height: 4px; border-radius: 50%;
    background: var(--clr-accent);
}
.legal-section p { color: var(--clr-text-muted); margin-bottom: 1rem; line-height: 1.85; font-size: 0.96rem; }
.legal-section p strong, .legal-section li strong { color: var(--clr-text); font-weight: 600; }
.legal-section ul, .legal-section ol {
    color: var(--clr-text-muted); padding-left: 1.5rem; margin-bottom: 1rem;
    font-size: 0.95rem; line-height: 1.85;
}
.legal-section ul { list-style: disc; }
.legal-section ol { list-style: decimal; }
.legal-section li { margin-bottom: 0.5rem; }
.legal-section a { color: var(--clr-accent); }
.legal-section a:hover { text-decoration: underline; }
.legal-section code {
    font-family: var(--font-mono); font-size: 0.88em;
    background: var(--clr-accent-light); color: var(--clr-accent);
    padding: 0.1rem 0.45rem; border-radius: 4px;
    border: 1px solid rgba(34,211,238,0.2);
}

.legal-callout {
    display: flex; gap: 0.85rem; align-items: flex-start;
    background: rgba(13,17,26,0.5);
    border: 1px solid var(--clr-border);
    padding: 1.1rem 1.25rem; border-radius: 12px; margin: 1.25rem 0;
    color: var(--clr-text); font-size: 0.93rem; line-height: 1.75;
    position: relative;
}
.legal-callout i {
    flex-shrink: 0; width: 28px; height: 28px;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--clr-accent); background: var(--clr-accent-light);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: 8px; font-size: 0.88rem; margin-top: 1px;
}
.legal-callout.warning { border-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.04); }
.legal-callout.warning i { color: var(--clr-warning); background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.25); }

.legal-footer-note {
    margin-top: 3rem; padding-top: 2rem;
    border-top: 1px solid var(--clr-border);
    color: var(--clr-text-dim); font-family: var(--font-mono); font-size: 0.88rem;
    text-align: center;
}

/* ========== 进入动画 ========== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
    .pricing-cards-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-card.highlight { transform: none; }
    .pricing-card.highlight:hover { transform: translateY(-4px); }
}

/* 默认隐藏移动端菜单按钮 */
.mobile-menu-btn { display: none; }

@media (max-width: 1024px) {
    .nav-links { gap: 1.25rem; }
    .nav-link { font-size: 0.88rem; }
    .universal-rights { grid-template-columns: repeat(2, 1fr); }
    .partner-grid { grid-template-columns: repeat(2, 1fr); }
    .cap-grid { grid-template-columns: repeat(2, 1fr); }
    .promo-banner { grid-template-columns: 1fr; gap: 1.25rem; }
    .promo-cta { justify-self: start; }
    .os-wrapper { grid-template-columns: 1fr; padding: 2rem; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
}

@media (max-width: 768px) {
    .section-padding { padding: 4rem 0; }
    .nav-links, .nav-actions { display: none; }
    .mobile-menu-btn {
        display: inline-flex; align-items: center; justify-content: center;
        width: 40px; height: 40px; background: rgba(255,255,255,0.04);
        border: 1px solid var(--clr-border-light); border-radius: 8px;
        color: var(--clr-text); font-size: 1.1rem; cursor: pointer;
        transition: var(--transition);
    }
    .mobile-menu-btn:hover { border-color: var(--clr-accent); color: var(--clr-accent); }

    /* Hero */
    .hero-section { padding-top: 120px; padding-bottom: 60px; }
    .hero-title { font-size: 2rem; }
    .hero-description { font-size: 0.98rem; }
    .hero-buttons { flex-direction: column; padding: 0 1rem; }
    .hero-rings { width: 320px; height: 320px; opacity: 0.3; }
    .hero-floats { display: none; }

    /* 价值标移动端 */
    .hero-stats {
        flex-wrap: wrap; gap: 0.5rem 0; padding: 1.2rem 1rem; border-radius: 12px;
    }
    .stat-item { flex: 0 0 45%; }
    .stat-number { font-size: 1.5rem; }
    .stat-label { font-size: 0.75rem; }
    .stat-divider { display: none; }

    /* Demo Tabs：滚动+渐隐+捏紧 */
    .demo-tabs {
        gap: 0.25rem;
        mask-image: linear-gradient(90deg, #000 92%, transparent);
        -webkit-mask-image: linear-gradient(90deg, #000 92%, transparent);
    }
    .tab-btn { padding: 0.7rem 0.95rem; font-size: 0.85rem; }
    .tab-pane { padding: 1.25rem 1rem; }

    /* 数据表格转卡片 */
    .table-scroll { border: none; overflow: visible; }
    .data-table, .data-table thead, .data-table tbody, .data-table tr, .data-table th, .data-table td {
        display: block; width: 100%; min-width: 0;
    }
    .data-table thead { display: none; }
    .data-table tr {
        margin-bottom: 0.85rem; padding: 0.85rem 1rem;
        background: rgba(13,17,26,0.6);
        border: 1px solid var(--clr-border); border-radius: 10px;
        position: relative;
    }
    .data-table tr:last-child { margin-bottom: 0; }
    .data-table tr:hover { background: rgba(13,17,26,0.6); }
    .data-table td {
        padding: 0.5rem 0; border-bottom: 1px dashed var(--clr-border);
        display: flex; align-items: center; justify-content: space-between;
        gap: 1rem; font-size: 0.88rem; line-height: 1.5;
    }
    .data-table td:last-child { border-bottom: none; }
    .data-table td::before {
        content: attr(data-label); flex-shrink: 0;
        color: var(--clr-text-muted); font-size: 0.74rem;
        font-weight: 500; letter-spacing: 0.5px;
    }
    .data-table td a {
        text-align: right; word-break: break-all; font-size: 0.82rem;
        max-width: 70%;
    }
    .demo-desc { font-size: 0.92rem; }

    /* 价格表 */
    .section-title { font-size: 1.55rem; }
    .pricing-cards-grid { grid-template-columns: 1fr; }

    /* 服务费优惠条 */
    .promo-banner {
        grid-template-columns: 1fr; gap: 1.25rem;
        padding: 1.5rem 1.25rem; text-align: center;
    }
    .promo-bg { display: none; }
    .promo-headline { font-size: 1.3rem; }
    .promo-list li { text-align: left; }
    .promo-cta { justify-self: center; }

    /* 联系区 */
    .ct-panel { grid-template-columns: 1fr; }
    .ct-left { border-right: none; border-bottom: 1px solid var(--clr-border); padding: 2rem 1.5rem; align-items: center; text-align: center; }
    .ct-heading { font-size: 1.3rem; }
    .ct-cta { align-self: center; }
    .ct-right { padding: 1.75rem 1.25rem; gap: 1rem; flex-wrap: wrap; }
    .ct-qr-img img { width: 100px; height: 100px; }

    /* 核心能力 */
    .cap-tabs {
        flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start;
        gap: 0.3rem; padding: 0.35rem; border-radius: 14px;
        -webkit-overflow-scrolling: touch; scrollbar-width: none;
    }
    .cap-tabs::-webkit-scrollbar { display: none; }
    .cap-tab { flex-shrink: 0; padding: 0.5rem 0.85rem; font-size: 0.82rem; border-radius: 10px; }
    .cap-grid { grid-template-columns: 1fr; gap: 0.85rem; }
    .cap-card { padding: 1.25rem 1.15rem; }

    /* 通用权益卡 */
    .universal-rights { grid-template-columns: 1fr; gap: 0.75rem; }
    .ur-item { padding: 0.85rem 1rem; }

    /* 开源底蕴 */
    .os-wrapper { grid-template-columns: 1fr; gap: 2rem; padding: 1.75rem 1.25rem; }
    .os-stats { grid-template-columns: repeat(2, 1fr); }
    .stat-value { font-size: 1.5rem; }
    .os-cta .btn { font-size: 0.85rem; padding: 0.6rem 1rem; }

    /* 授权商 */
    .partner-grid { grid-template-columns: 1fr; gap: 0.85rem; }
    .partner-card { padding: 1.35rem 1.15rem; }
    .partner-cta { flex-direction: column; text-align: center; padding: 1.5rem 1.25rem; gap: 1rem; }

    /* Footer 移动端 */
    .footer { padding: 3rem 0 1rem; }
    .footer-top { grid-template-columns: 1fr; gap: 2rem; padding-bottom: 2rem; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 0.5rem; }
    .footer-meta { justify-content: center; }
}

@media (max-width: 480px) {
    .footer-cols { grid-template-columns: 1fr; }
}

/* ── Screenshots Section ── */
.screenshots-section { background: #0d0d0d; }

.ss-tabs {
    display: flex; justify-content: center; gap: 0.5rem;
    margin-bottom: 2.5rem; flex-wrap: wrap;
}
.ss-tab {
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.55); padding: 0.65rem 1.35rem; border-radius: 10px;
    font-size: 0.92rem; cursor: pointer; transition: all 0.25s;
}
.ss-tab:hover { color: #fff; border-color: rgba(255,255,255,0.18); }
.ss-tab.active {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff; border-color: transparent;
}
.ss-tab i { margin-right: 0.4rem; }

.ss-panel { display: none; }
.ss-panel.active { display: block; animation: ssFadeIn 0.35s ease; }
@keyframes ssFadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.ss-grid {
    display: grid; gap: 1.25rem;
}
.ss-grid--pc { grid-template-columns: repeat(2, 1fr); }
.ss-grid--mobile { grid-template-columns: repeat(3, 1fr); }

.ss-item {
    margin: 0; border-radius: 12px; overflow: hidden;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
    transition: transform 0.3s, box-shadow 0.3s;
}
.ss-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(99,102,241,0.15);
}
.ss-item img {
    width: 100%; height: auto; display: block;
    cursor: pointer;
}
.ss-item figcaption {
    padding: 0.7rem 1rem; text-align: center;
    font-size: 0.85rem; color: rgba(255,255,255,0.5);
}

@media (max-width: 768px) {
    .ss-grid--pc { grid-template-columns: 1fr; }
    .ss-grid--mobile { grid-template-columns: repeat(2, 1fr); }
    .ss-tabs { gap: 0.35rem; }
    .ss-tab { padding: 0.5rem 0.9rem; font-size: 0.82rem; }
}
@media (max-width: 480px) {
    .ss-grid--mobile { grid-template-columns: 1fr; }
}