/* =====================================================================
   Cinebench 中文官网 - 全局样式表
   配色源自品牌 logo：深海军蓝 #0A2A6E + 亮蓝 #2563EB + 中性灰
   风格：扁平 / 现代 / 专业
   ===================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
    --c-primary: #0A2A6E;          /* 主品牌色 - 深海军蓝 */
    --c-primary-dark: #061D52;     /* 主色深 */
    --c-primary-light: #1E40AF;    /* 主色亮 */
    --c-accent: #2563EB;           /* 强调蓝 */
    --c-accent-soft: #DBEAFE;      /* 强调浅底 */
    --c-bg: #FFFFFF;               /* 主背景 */
    --c-bg-soft: #F5F7FB;          /* 浅灰背景 */
    --c-bg-dark: #0A1733;          /* 深色区块背景 */
    --c-text: #1A2138;             /* 正文文字 */
    --c-text-soft: #5A6478;        /* 次要文字 */
    --c-text-mute: #8B93A7;        /* 弱化文字 */
    --c-border: #E5E9F0;           /* 边框 */
    --c-success: #10B981;          /* 成功 */
    --c-warning: #F59E0B;          /* 警告 */
    --c-danger: #EF4444;           /* 危险 */
    --c-white: #FFFFFF;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(10, 42, 110, 0.06), 0 1px 3px rgba(10, 42, 110, 0.04);
    --shadow-md: 0 4px 12px rgba(10, 42, 110, 0.08), 0 2px 4px rgba(10, 42, 110, 0.04);
    --shadow-lg: 0 12px 32px rgba(10, 42, 110, 0.12), 0 4px 8px rgba(10, 42, 110, 0.06);
    --shadow-xl: 0 24px 60px rgba(10, 42, 110, 0.18), 0 8px 16px rgba(10, 42, 110, 0.08);

    --container-w: 1200px;
    --header-h: 72px;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑",
                 Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;

    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: color 0.2s var(--ease); }
a:hover { color: var(--c-primary); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
    color: var(--c-text);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }
p { color: var(--c-text-soft); }

/* ---------- 4. 容器与布局 ---------- */
.container {
    width: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-bg-soft { background: var(--c-bg-soft); }
.section-bg-dark { background: var(--c-bg-dark); color: #E5EAF5; }
.section-bg-dark h1, .section-bg-dark h2, .section-bg-dark h3, .section-bg-dark h4 { color: #fff; }
.section-bg-dark p { color: #B8C2D9; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-accent);
    background: var(--c-accent-soft);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}
.section-head h2 { margin-bottom: 16px; }
.section-head p { font-size: 1.0625rem; color: var(--c-text-soft); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- 5. 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-md);
    transition: all 0.25s var(--ease);
    white-space: nowrap;
    border: 1.5px solid transparent;
    cursor: pointer;
}
.btn-primary {
    background: var(--c-accent);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.32);
}
.btn-primary:hover {
    background: var(--c-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.42);
}
.btn-secondary {
    background: var(--c-white);
    color: var(--c-primary);
    border-color: var(--c-border);
}
.btn-secondary:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
    transform: translateY(-2px);
}
.btn-ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.32);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ---------- 6. 顶部导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--c-border);
}
.site-header .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--c-text);
    font-weight: 700;
    font-size: 1.125rem;
}
.brand:hover { color: var(--c-primary); }
.brand img { width: 36px; height: 36px; }
.brand small { display: block; font-size: 0.6875rem; font-weight: 500; color: var(--c-text-mute); letter-spacing: 0.04em; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
    color: var(--c-text);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all 0.2s var(--ease);
}
.main-nav a:hover { color: var(--c-accent); background: var(--c-accent-soft); }
.main-nav a.active { color: var(--c-accent); background: var(--c-accent-soft); }

.header-cta { display: flex; align-items: center; gap: 12px; }

.nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--radius-sm); }
.nav-toggle:hover { background: var(--c-bg-soft); }
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 900px) {
    .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        border-bottom: 1px solid var(--c-border);
        padding: 12px 24px 24px;
        gap: 4px;
        transform: translateY(-150%);
        transition: transform 0.3s var(--ease);
        box-shadow: var(--shadow-lg);
    }
    .main-nav.open { transform: translateY(0); }
    .main-nav a { padding: 12px 14px; }
    .nav-toggle { display: inline-flex; }
    .header-cta .btn:not(.btn-primary) { display: none; }
}

/* ---------- 7. Hero 区域 ---------- */
.hero {
    position: relative;
    padding: 100px 0 80px;
    background:
        radial-gradient(ellipse at top right, rgba(37, 99, 235, 0.08), transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(10, 42, 110, 0.06), transparent 50%),
        linear-gradient(180deg, #F5F7FB 0%, #FFFFFF 100%);
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(10, 42, 110, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 42, 110, 0.035) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    pointer-events: none;
}
.hero .container { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero .container { grid-template-columns: 1fr; gap: 32px; } .hero { padding: 64px 0 48px; } }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-full);
    padding: 6px 14px 6px 6px;
    font-size: 0.8125rem;
    color: var(--c-text-soft);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}
.hero-badge .tag { background: var(--c-accent); color: #fff; padding: 3px 10px; border-radius: var(--radius-full); font-weight: 600; font-size: 0.6875rem; }

.hero h1 { margin-bottom: 20px; }
.hero h1 .grad {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-lead { font-size: 1.125rem; color: var(--c-text-soft); margin-bottom: 32px; max-width: 540px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 28px; }
.hero-meta .item .num { font-size: 1.5rem; font-weight: 700; color: var(--c-primary); line-height: 1.2; }
.hero-meta .item .lbl { font-size: 0.8125rem; color: var(--c-text-mute); }

/* Hero 视觉块 - 模拟跑分界面 */
.hero-visual {
    position: relative;
    background: linear-gradient(160deg, #0F2A6B 0%, #061D52 100%);
    border-radius: var(--radius-xl);
    padding: 28px;
    box-shadow: var(--shadow-xl);
    color: #E5EAF5;
    overflow: hidden;
}
.hero-visual::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -30%;
    width: 80%;
    height: 100%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.35), transparent 60%);
    pointer-events: none;
}
.bench-window { position: relative; }
.bench-titlebar { display: flex; align-items: center; gap: 8px; margin-bottom: 20px; }
.bench-titlebar .dot { width: 10px; height: 10px; border-radius: 50%; }
.bench-titlebar .dot.r { background: #FF5F57; }
.bench-titlebar .dot.y { background: #FEBC2E; }
.bench-titlebar .dot.g { background: #28C840; }
.bench-titlebar .name { margin-left: 12px; font-size: 0.8125rem; color: #B8C2D9; font-family: var(--font-mono); }

.bench-score-label { font-size: 0.8125rem; color: #B8C2D9; margin-bottom: 6px; letter-spacing: 0.05em; text-transform: uppercase; }
.bench-score { font-family: var(--font-mono); font-size: 3.25rem; font-weight: 700; color: #fff; line-height: 1; margin-bottom: 4px; }
.bench-score .pts { font-size: 1rem; color: #B8C2D9; margin-left: 8px; font-weight: 500; }
.bench-sub { font-size: 0.875rem; color: #B8C2D9; margin-bottom: 24px; }

.bench-bars { display: flex; flex-direction: column; gap: 14px; }
.bench-bar-row { display: grid; grid-template-columns: 90px 1fr 50px; gap: 12px; align-items: center; }
.bench-bar-row .name { font-size: 0.8125rem; color: #B8C2D9; }
.bench-bar { height: 8px; background: rgba(255, 255, 255, 0.08); border-radius: var(--radius-full); overflow: hidden; }
.bench-bar .fill { height: 100%; background: linear-gradient(90deg, var(--c-accent), #60A5FA); border-radius: inherit; }
.bench-bar-row .val { font-family: var(--font-mono); font-size: 0.8125rem; color: #fff; text-align: right; }

.bench-status { display: flex; align-items: center; gap: 8px; margin-top: 24px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, 0.08); font-size: 0.8125rem; color: #B8C2D9; }
.bench-status .pulse { width: 8px; height: 8px; border-radius: 50%; background: #10B981; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); } 70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); } 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); } }

/* ---------- 8. 信任栏 ---------- */
.trust-bar { padding: 32px 0; border-bottom: 1px solid var(--c-border); background: #fff; }
.trust-bar .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.trust-bar .lbl { font-size: 0.8125rem; color: var(--c-text-mute); letter-spacing: 0.05em; }
.trust-bar .logos { display: flex; flex-wrap: wrap; align-items: center; gap: 36px; }
.trust-bar .logo-item { font-size: 1rem; font-weight: 600; color: var(--c-text-mute); letter-spacing: 0.02em; transition: color 0.2s var(--ease); }
.trust-bar .logo-item:hover { color: var(--c-primary); }

/* ---------- 9. 特性卡片 ---------- */
.feature-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s var(--ease);
    height: 100%;
}
.feature-card:hover {
    border-color: var(--c-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.feature-card .icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-accent-soft), #EFF6FF);
    color: var(--c-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.feature-card .icon svg { width: 28px; height: 28px; }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: 0.9375rem; }

/* ---------- 10. 使用场景 ---------- */
.usecase-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    overflow: hidden;
    transition: all 0.3s var(--ease);
}
.usecase-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease);
}
.usecase-card:hover::before { transform: scaleX(1); }
.usecase-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.usecase-card .num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--c-primary);
    color: #fff;
    font-weight: 700;
    font-family: var(--font-mono);
    margin-bottom: 16px;
}
.usecase-card h3 { margin-bottom: 8px; font-size: 1.125rem; }
.usecase-card p { font-size: 0.9375rem; }

/* ---------- 11. 用户评价 ---------- */
.review-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
    transition: all 0.3s var(--ease);
}
.review-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.review-card .stars { display: flex; gap: 2px; color: #F59E0B; }
.review-card .stars svg { width: 18px; height: 18px; }
.review-card .quote { font-size: 1rem; color: var(--c-text); line-height: 1.7; flex: 1; }
.review-card .quote::before { content: "\201C"; font-size: 2.5rem; color: var(--c-accent-soft); line-height: 0.5; vertical-align: -0.2em; margin-right: 6px; font-family: Georgia, serif; }
.review-card .user { display: flex; align-items: center; gap: 12px; padding-top: 16px; border-top: 1px solid var(--c-border); }
.review-card .avatar {
    width: 44px; height: 44px; border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem;
}
.review-card .user-info .name { font-weight: 600; color: var(--c-text); font-size: 0.9375rem; }
.review-card .user-info .role { font-size: 0.8125rem; color: var(--c-text-mute); }

/* ---------- 12. 步骤条 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }
.step {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    position: relative;
}
.step .step-num {
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--c-primary); color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1.125rem; margin-bottom: 16px;
    box-shadow: 0 6px 16px rgba(10, 42, 110, 0.25);
}
.step h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.step p { font-size: 0.875rem; }

/* ---------- 13. 下载区/版本表 ---------- */
.version-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s var(--ease);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.version-card:hover { box-shadow: var(--shadow-lg); border-color: var(--c-accent); }
.version-card.featured {
    border-color: var(--c-accent);
    box-shadow: 0 12px 32px rgba(37, 99, 235, 0.18);
    position: relative;
}
.version-card.featured::before {
    content: "推荐";
    position: absolute;
    top: -12px; left: 32px;
    background: var(--c-accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    letter-spacing: 0.04em;
}
.version-card .platform {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}
.version-card .platform .icon {
    width: 48px; height: 48px;
    background: var(--c-bg-soft);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: var(--c-primary);
}
.version-card .platform .icon svg { width: 28px; height: 28px; }
.version-card .platform h3 { font-size: 1.25rem; margin: 0; }
.version-card .platform .ver { font-size: 0.8125rem; color: var(--c-text-mute); }

.spec-table { width: 100%; margin: 16px 0 24px; }
.spec-table tr { border-bottom: 1px solid var(--c-border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 10px 0; font-size: 0.875rem; }
.spec-table td:first-child { color: var(--c-text-mute); }
.spec-table td:last-child { color: var(--c-text); font-weight: 500; text-align: right; }

.version-card .size { font-size: 0.8125rem; color: var(--c-text-mute); margin-bottom: 16px; }

/* ---------- 14. CTA 横幅 ---------- */
.cta-banner {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 50%, var(--c-accent) 100%);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}
.cta-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.12), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08), transparent 40%);
    pointer-events: none;
}
.cta-banner h2 { color: #fff; margin-bottom: 12px; position: relative; }
.cta-banner p { color: rgba(255, 255, 255, 0.88); margin-bottom: 28px; position: relative; font-size: 1.0625rem; }
.cta-banner .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; position: relative; }
.cta-banner .btn-primary { background: #fff; color: var(--c-primary); }
.cta-banner .btn-primary:hover { background: #fff; color: var(--c-accent); transform: translateY(-2px); }

/* ---------- 15. 数据条 ---------- */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 640px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }
.stat-box { text-align: center; }
.stat-box .num {
    font-family: var(--font-mono);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}
.stat-box .lbl { font-size: 0.875rem; color: var(--c-text-mute); margin-top: 6px; }

/* ---------- 16. 表格 ---------- */
.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.data-table thead { background: var(--c-bg-soft); }
.data-table th { padding: 14px 20px; text-align: left; font-size: 0.8125rem; font-weight: 600; color: var(--c-text-soft); letter-spacing: 0.04em; text-transform: uppercase; }
.data-table td { padding: 14px 20px; font-size: 0.9375rem; border-top: 1px solid var(--c-border); }
.data-table tbody tr:hover { background: var(--c-bg-soft); }
.data-table .score { font-family: var(--font-mono); font-weight: 700; color: var(--c-accent); }

/* ---------- 17. 时间线 ---------- */
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before { content: ""; position: absolute; top: 0; bottom: 0; left: 20px; width: 2px; background: var(--c-border); }
.timeline-item { position: relative; padding: 0 0 32px 60px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
    content: "";
    position: absolute;
    left: 12px; top: 4px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--c-accent);
    z-index: 1;
}
.timeline-item .year { font-family: var(--font-mono); font-size: 0.875rem; font-weight: 700; color: var(--c-accent); margin-bottom: 4px; }
.timeline-item h3 { font-size: 1.0625rem; margin-bottom: 6px; }
.timeline-item p { font-size: 0.9375rem; }

/* ---------- 18. FAQ ---------- */
.faq-item { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; transition: all 0.2s var(--ease); }
.faq-item:hover { border-color: var(--c-accent-soft); }
.faq-q { width: 100%; padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; text-align: left; font-weight: 600; color: var(--c-text); font-size: 1rem; }
.faq-q .chev { width: 20px; height: 20px; transition: transform 0.3s var(--ease); color: var(--c-text-mute); flex-shrink: 0; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); color: var(--c-accent); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s var(--ease); }
.faq-a-inner { padding: 0 24px 20px; color: var(--c-text-soft); font-size: 0.9375rem; line-height: 1.7; }

/* ---------- 19. 页脚 ---------- */
.site-footer { background: var(--c-bg-dark); color: #B8C2D9; padding: 64px 0 32px; }
.site-footer .grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 768px) { .site-footer .grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .site-footer .grid { grid-template-columns: 1fr; } }
.site-footer .brand { color: #fff; margin-bottom: 16px; }
.site-footer .brand small { color: #8B93A7; }
.site-footer .desc { font-size: 0.875rem; color: #8B93A7; margin-bottom: 20px; max-width: 320px; }
.site-footer h4 { color: #fff; font-size: 0.9375rem; margin-bottom: 16px; letter-spacing: 0.02em; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul li a { color: #B8C2D9; font-size: 0.875rem; }
.site-footer ul li a:hover { color: #fff; }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a {
    width: 36px; height: 36px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: #B8C2D9;
    transition: all 0.2s var(--ease);
}
.footer-social a:hover { background: var(--c-accent); color: #fff; transform: translateY(-2px); }
.footer-social svg { width: 18px; height: 18px; }

.footer-bottom {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.8125rem;
    color: #8B93A7;
}
.footer-bottom .links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-bottom a { color: #8B93A7; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 20. 下载弹窗 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 23, 51, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s var(--ease), visibility 0.25s var(--ease);
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
    background: #fff;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(20px);
    transition: transform 0.3s var(--ease-out);
    overflow: hidden;
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }
.modal-header {
    padding: 28px 32px 20px;
    text-align: center;
    border-bottom: 1px solid var(--c-border);
    position: relative;
}
.modal-header h3 { font-size: 1.375rem; margin-bottom: 6px; }
.modal-header p { font-size: 0.875rem; color: var(--c-text-mute); }
.modal-close {
    position: absolute;
    top: 16px; right: 16px;
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--c-text-mute);
    transition: all 0.2s var(--ease);
}
.modal-close:hover { background: var(--c-bg-soft); color: var(--c-text); }
.modal-close svg { width: 18px; height: 18px; }
.modal-body { padding: 28px 32px 32px; }
.qr-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.qr-item {
    text-align: center;
    padding: 20px 12px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    transition: all 0.2s var(--ease);
}
.qr-item:hover { border-color: var(--c-accent); background: var(--c-accent-soft); }
.qr-item img { width: 160px; height: 160px; margin: 0 auto 12px; display: block; image-rendering: pixelated; }
.qr-item .platform-name { font-size: 0.9375rem; font-weight: 600; color: var(--c-text); margin-bottom: 2px; }
.qr-item .platform-desc { font-size: 0.75rem; color: var(--c-text-mute); }
.modal-note {
    background: var(--c-bg-soft);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-size: 0.8125rem;
    color: var(--c-text-soft);
    display: flex;
    gap: 10px;
    align-items: flex-start;
}
.modal-note svg { width: 16px; height: 16px; color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }

/* ---------- 21. 通用工具类 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.eyebrow-line {
    display: inline-block;
    height: 2px;
    width: 40px;
    background: var(--c-accent);
    margin-bottom: 16px;
}

/* ---------- 22. 面包屑 ---------- */
.breadcrumb { padding: 20px 0; background: var(--c-bg-soft); border-bottom: 1px solid var(--c-border); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 0.875rem; color: var(--c-text-mute); }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li::after { content: "/"; color: var(--c-text-mute); margin-left: 8px; }
.breadcrumb li:last-child::after { display: none; }
.breadcrumb li:last-child { color: var(--c-text); }
.breadcrumb a { color: var(--c-text-mute); }
.breadcrumb a:hover { color: var(--c-accent); }

/* ---------- 23. 页面 Hero（次级页面） ---------- */
.page-hero {
    background: linear-gradient(180deg, #F5F7FB 0%, #FFFFFF 100%);
    padding: 56px 0 64px;
    border-bottom: 1px solid var(--c-border);
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(10, 42, 110, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 42, 110, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at top right, #000 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at top right, #000 0%, transparent 70%);
}
.page-hero .container { position: relative; }
.page-hero h1 { margin-bottom: 14px; }
.page-hero p { font-size: 1.0625rem; max-width: 680px; }

/* ---------- 24. 信息块 ---------- */
.info-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
@media (max-width: 900px) { .info-block { grid-template-columns: 1fr; gap: 32px; } }
.info-block.reverse > .info-text { order: 2; }
@media (max-width: 900px) { .info-block.reverse > .info-text { order: 1; } .info-block.reverse > .info-visual { order: 2; } }
.info-text h2 { margin-bottom: 16px; }
.info-text p { margin-bottom: 14px; }
.info-text ul.checks { margin-top: 20px; }
.info-text ul.checks li { position: relative; padding-left: 28px; margin-bottom: 12px; font-size: 0.9375rem; color: var(--c-text); }
.info-text ul.checks li::before {
    content: "";
    position: absolute;
    left: 0; top: 4px;
    width: 18px; height: 18px;
    background: var(--c-accent);
    border-radius: 50%;
    -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z' fill='black'/></svg>") center / contain no-repeat;
            mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z' fill='black'/></svg>") center / contain no-repeat;
}
.info-visual img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* ---------- 25. 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 26. 返回顶部 ---------- */
.back-to-top {
    position: fixed;
    right: 24px; bottom: 24px;
    width: 44px; height: 44px;
    background: var(--c-primary);
    color: #fff;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s var(--ease);
    z-index: 999;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--c-accent); transform: translateY(-4px); }
.back-to-top svg { width: 22px; height: 22px; }

/* ---------- 27. 响应式微调 ---------- */
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-sm { padding: 40px 0; }
    .cta-banner { padding: 40px 24px; }
    .hero-meta { gap: 20px; }
    .hero-meta .item .num { font-size: 1.25rem; }
}