/* ═══════════════════════════════════════════
           设计令牌 — Shopify 风格
        ═══════════════════════════════════════════ */
        :root {
            --brand: #1eb2f6;
            --brand-hover: #169adb;
            --brand-dark: #0a2540;
            --brand-darker: #061a2e;
            --brand-light: #e0f4fe;
            --brand-subtle: #f0f9ff;
            --brand-glow: rgba(30, 178, 246, 0.15);

            --bg: #ffffff;
            --bg-muted: #f8fafc;
            --bg-soft: #f1f5f9;
            --bg-dark: var(--brand-dark);
            --ink: #0f172a;
            --ink-secondary: #475569;
            --ink-tertiary: #94a3b8;
            --border: #e2e8f0;
            --border-strong: #cbd5e1;

            --success: #10b981;
            --warning: #f59e0b;

            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 24px -4px rgba(0,0,0,0.08);
            --shadow-lg: 0 24px 48px -12px rgba(10,37,64,0.15);
            --shadow-brand: 0 8px 32px -8px rgba(30,178,246,0.35);

            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;

            --ease: cubic-bezier(0.16, 1, 0.3, 1);
            --transition: 0.3s var(--ease);

            --nav-height: 68px;
            --container: 1280px;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            font-size: 16px; line-height: 1.6; color: var(--ink);
            background: var(--bg); overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }
        img { display: block; max-width: 100%; height: auto; }
        ::selection { background: var(--brand); color: #fff; }
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-muted); }
        ::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--ink-tertiary); }

        /* ═══ 排版 — Shopify 式超大标题 ═══ */
        .display { font-size: clamp(3rem, 8vw, 6rem); font-weight: 900; line-height: 1; letter-spacing: -0.04em; }
        .h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; }
        .h2 { font-size: clamp(2rem, 4.5vw, 3.5rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.025em; }
        .h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; }
        .lead { font-size: clamp(1.125rem, 1.8vw, 1.375rem); line-height: 1.6; color: var(--ink-secondary); font-weight: 400; }
        .body { font-size: 1rem; line-height: 1.7; color: var(--ink-secondary); }
        .small { font-size: 0.875rem; line-height: 1.5; color: var(--ink-tertiary); }

        /* ═══ 布局 ═══ */
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .section { padding: clamp(4rem, 10vw, 8rem) 0; }
        .section-tight { padding: clamp(2.5rem, 6vw, 4rem) 0; }

        /* ═══ 导航栏 ═══ */
        .nav {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height); display: flex; align-items: center;
            background: rgba(255,255,255,0); backdrop-filter: blur(0px);
            transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease), box-shadow 0.4s var(--ease);
            border-bottom: 1px solid transparent;
        }
        .nav.scrolled {
            background: rgba(255,255,255,0.85); backdrop-filter: blur(20px) saturate(180%);
            box-shadow: 0 1px 0 rgba(0,0,0,0.06); border-bottom-color: var(--border);
        }
        .nav-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
        .logo { display: flex; align-items: center; gap: 10px; cursor: pointer; }
        .logo-mark {
            width: 40px; height: 40px; border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(30,178,246,0.35);
            transition: transform 0.3s var(--ease);
            flex-shrink: 0;
        }
        .logo-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
        .logo:hover .logo-mark { transform: scale(1.08) rotate(-3deg); }
        .logo-text { font-size: 21px; font-weight: 800; color: var(--brand-dark); letter-spacing: -0.02em; }
        .logo-text span { color: var(--brand); }
        .nav-links { display: flex; gap: 4px; align-items: center; }
        .nav-links a {
            font-size: 0.9375rem; font-weight: 500; color: var(--ink-secondary);
            padding: 8px 14px; border-radius: var(--radius-sm);
            transition: all var(--transition); cursor: pointer;
        }
        .nav-links a:hover { color: var(--brand); background: var(--brand-subtle); }
        .nav-links a.active { color: var(--brand); font-weight: 600; }
        .nav-cta {
            background: var(--ink) !important; color: #fff !important;
            padding: 10px 22px !important; border-radius: var(--radius-full) !important;
            font-weight: 600 !important; font-size: 0.9375rem !important;
        }
        .nav-cta:hover { background: var(--brand) !important; transform: translateY(-1px); }
        .nav-aimall { color: var(--brand) !important; font-weight: 600 !important; }
        .menu-toggle { display: none; font-size: 22px; cursor: pointer; color: var(--ink); background: none; border: none; }


        /* ═══ Hero — Shopify 式超大标题 ═══ */
        .hero {
            padding-top: calc(var(--nav-height) + 3rem);
            padding-bottom: 0;
            text-align: center;
            overflow: hidden;
        }
        .hero-eyebrow {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 6px 18px; border-radius: var(--radius-full);
            background: var(--brand-subtle); border: 1px solid var(--brand-light);
            font-size: 0.875rem; font-weight: 600; color: var(--brand);
            margin-bottom: 24px;
        }
        .hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); animation: pulse 2s infinite; }
        @keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

        .hero-title {
            font-size: clamp(3rem, 9vw, 7rem); font-weight: 900;
            line-height: 0.98; letter-spacing: -0.045em;
            color: var(--ink); margin-bottom: 0;
        }
        .hero-title .rotator {
            display: inline-block; color: var(--brand);
            position: relative;
        }
        .hero-subtitle {
            font-size: clamp(1.0625rem, 1.8vw, 1.375rem);
            line-height: 1.6; color: var(--ink-secondary);
            max-width: 640px; margin: 24px auto 32px;
        }
        .hero-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 4rem; }

        /* 品牌网格 */
        .brand-grid-section { padding: 0 0 4rem; text-align: center; }
        .brand-grid-title { font-size: 0.875rem; font-weight: 600; color: var(--ink-tertiary); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 28px; }
        .brand-grid {
            display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px;
            max-width: 1000px; margin: 0 auto;
        }
        .brand-item {
            height: 88px; border-radius: var(--radius-md);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.25rem; font-weight: 700; color: var(--ink-tertiary);
            background: var(--bg-muted); border: 1px solid transparent;
            transition: all var(--transition); cursor: pointer;
            gap: 8px;
        }
        .brand-item:hover { border-color: var(--border); color: var(--ink); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        .brand-item i { font-size: 1.5rem; }

        /* ═══ 按钮 ═══ */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 32px; border-radius: var(--radius-full);
            font-size: 1rem; font-weight: 600;
            transition: all var(--transition); cursor: pointer;
            border: none; outline: none;
        }
        .btn-primary { background: var(--ink); color: #fff; }
        .btn-primary:hover { background: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow-brand); }
        .btn-brand { background: var(--brand); color: #fff; }
        .btn-brand:hover { background: var(--brand-hover); transform: translateY(-2px); box-shadow: var(--shadow-brand); }
        .btn-light { background: #fff; color: var(--ink); border: 1px solid var(--border); }
        .btn-light:hover { border-color: var(--ink); transform: translateY(-2px); box-shadow: var(--shadow); }
        .btn-ghost { background: transparent; border: 1.5px solid var(--border-strong); color: var(--ink); }
        .btn-ghost:hover { border-color: var(--ink); background: var(--bg-muted); }
        .btn-dark { background: var(--brand-dark); color: #fff; }
        .btn-dark:hover { background: var(--brand-darker); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .btn-lg { padding: 16px 40px; font-size: 1.0625rem; }
        .btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }

        /* ═══ 区块标题 ═══ */
        .section-head { text-align: center; max-width: 720px; margin: 0 auto clamp(3rem, 6vw, 5rem); }
        .section-head .eyebrow {
            display: inline-block; font-size: 0.8125rem; font-weight: 700;
            text-transform: uppercase; letter-spacing: 0.12em; color: var(--brand);
            margin-bottom: 14px;
        }
        .section-head h2 { margin-bottom: 16px; }
        .section-head p { color: var(--ink-secondary); }

        /* ═══ 深色区块 ═══ */
        .dark-section { background: var(--brand-dark); color: #fff; }
        .dark-section .section-head h2 { color: #fff; }
        .dark-section .section-head p { color: rgba(255,255,255,0.7); }
        .dark-section .eyebrow { color: var(--brand); }

        /* ═══ 核心能力卡片 — Shopify 式 ═══ */
        .capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .cap-card {
            background: var(--bg); border: 1px solid var(--border);
            border-radius: var(--radius-lg); padding: 36px 32px;
            transition: all var(--transition); position: relative; overflow: hidden;
        }
        .cap-card:hover { border-color: var(--brand); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .cap-card .icon-wrap {
            width: 56px; height: 56px; border-radius: var(--radius-md);
            background: var(--brand-subtle); color: var(--brand);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.5rem; margin-bottom: 20px;
            transition: all var(--transition); overflow: hidden;
        }
        .cap-card .icon-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
        .cap-card:hover .icon-wrap { background: var(--brand); color: #fff; transform: scale(1.1); }
        .cap-card h3 { margin-bottom: 8px; }
        .cap-card p { font-size: 0.9375rem; }
        .cap-card.featured { background: var(--brand-dark); border-color: var(--brand-dark); }
        .cap-card.featured h3 { color: #fff; }
        .cap-card.featured p { color: rgba(255,255,255,0.7); }
        .cap-card.featured .icon-wrap { background: rgba(30,178,246,0.2); color: var(--brand); }
        .cap-card.featured:hover .icon-wrap { background: var(--brand); color: #fff; }
        .cap-card .tag {
            position: absolute; top: 20px; right: 20px;
            font-size: 0.6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
            padding: 3px 10px; border-radius: var(--radius-full);
            background: var(--brand-subtle); color: var(--brand);
        }
        .cap-card.featured .tag { background: rgba(30,178,246,0.2); }

        /* ═══ 横向滚动展示 — Shopify 式 ═══ */
        .scroll-row { overflow-x: auto; scroll-snap-type: x mandatory; gap: 16px; display: flex; padding-bottom: 16px; }
        .scroll-row::-webkit-scrollbar { height: 6px; }
        .scroll-card {
            flex: 0 0 380px; scroll-snap-align: start;
            background: var(--bg); border: 1px solid var(--border);
            border-radius: var(--radius-lg); padding: 32px;
            transition: all var(--transition);
        }
        .scroll-card:hover { border-color: var(--brand); transform: translateY(-4px); box-shadow: var(--shadow); }
        .scroll-card .icon-wrap { width: 48px; height: 48px; border-radius: var(--radius-sm); background: var(--brand-subtle); color: var(--brand); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; margin-bottom: 16px; }
        .scroll-card h4 { font-size: 1.125rem; margin-bottom: 8px; }
        .scroll-card p { font-size: 0.9375rem; margin-bottom: 16px; }
        .scroll-card .stats-row { display: flex; gap: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
        .scroll-card .stat .num { font-size: 1.25rem; font-weight: 800; color: var(--brand); }
        .scroll-card .stat .desc { font-size: 0.75rem; color: var(--ink-tertiary); }

        /* ═══ 全球交易卡片动画 ═══ */
        .trade-showcase {
            position: relative; overflow: hidden; border-radius: var(--radius-xl);
            background: var(--brand-dark); padding: clamp(2.5rem, 5vw, 4rem);
        }
        .trade-cards { display: flex; gap: 16px; animation: tradeScroll 30s linear infinite; width: max-content; }
        @keyframes tradeScroll { to { transform: translateX(-50%); } }
        .trade-card {
            flex: 0 0 240px; background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-md);
            padding: 20px; color: #fff;
        }
        .trade-card .flag { font-size: 2rem; margin-bottom: 8px; }
        .trade-card .country { font-size: 0.875rem; color: rgba(255,255,255,0.6); margin-bottom: 4px; }
        .trade-card .amount { font-size: 1.5rem; font-weight: 800; }
        .trade-card .method { font-size: 0.8125rem; color: var(--brand); margin-top: 4px; }

        /* ═══ 案例故事 ═══ */
        .story-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .story-card {
            border-radius: var(--radius-lg); overflow: hidden;
            background: var(--bg); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .story-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .story-img { aspect-ratio: 16/10; background: var(--brand-dark); display: flex; align-items: center; justify-content: center; color: var(--brand); font-size: 3rem; position: relative; }
        .story-img::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 40%, rgba(30,178,246,0.15), transparent 70%); }
        .story-img i { position: relative; z-index: 2; }
        .story-body { padding: 24px; }
        .story-body .stage { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--brand); margin-bottom: 8px; }
        .story-body h4 { font-size: 1.125rem; margin-bottom: 8px; }
        .story-body p { font-size: 0.9375rem; margin-bottom: 16px; }
        .story-body .revenue { font-size: 1.5rem; font-weight: 800; color: var(--ink); }
        .story-body .revenue-label { font-size: 0.8125rem; color: var(--ink-tertiary); }

        /* ═══ AI 助手区 ═══ */
        .ai-hero {
            display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
            align-items: center; background: var(--bg-muted);
            border-radius: var(--radius-xl); padding: clamp(2.5rem, 5vw, 4rem);
        }
        .ai-hero-visual {
            aspect-ratio: 1; border-radius: var(--radius-lg);
            background: var(--brand-dark);
            display: flex; align-items: center; justify-content: center;
            position: relative; overflow: hidden;
        }
        .ai-hero-visual::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 40% 40%, rgba(30,178,246,0.2), transparent 60%); }
        .ai-orb {
            width: 60%; aspect-ratio: 1; border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.1);
            background: rgba(30,178,246,0.1); backdrop-filter: blur(20px);
            display: flex; align-items: center; justify-content: center;
            position: relative; z-index: 2;
        }
        .ai-orb i { font-size: 3rem; color: var(--brand); }
        .ai-orb::after { content: ''; position: absolute; inset: -10px; border-radius: 50%; border: 1px dashed rgba(30,178,246,0.3); animation: spin 10s linear infinite; }
        @keyframes spin { to { transform: rotate(360deg); } }
        .ai-feature-list { display: grid; gap: 16px; margin-top: 24px; }
        .ai-feature-item { display: flex; gap: 12px; align-items: flex-start; }
        .ai-feature-item .check { width: 24px; height: 24px; border-radius: 50%; background: var(--brand); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; flex-shrink: 0; margin-top: 2px; }

        /* ═══ 数据统计 CTA ═══ */
        .stat-band { text-align: center; }
        .stat-band-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
        .stat-band-item .num { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 900; color: var(--brand); line-height: 1; letter-spacing: -0.03em; }
        .stat-band-item .suffix { font-size: 0.5em; font-weight: 700; }
        .stat-band-item .label { font-size: 0.9375rem; color: rgba(255,255,255,0.6); margin-top: 10px; }

        /* ═══ 产品与方案 ═══ */
        .product-feature { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; padding: clamp(2.5rem, 6vw, 5rem) 0; }
        .product-feature:nth-child(even) .pf-text { order: 2; }
        .product-feature:nth-child(even) .pf-visual { order: 1; }
        .pf-text .badge { display: inline-block; font-size: 0.8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--brand); margin-bottom: 12px; }
        .pf-text h3 { margin-bottom: 16px; }
        .pf-text p { margin-bottom: 24px; }
        .pf-list li { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; color: var(--ink-secondary); }
        .pf-list li i { color: var(--brand); margin-top: 4px; flex-shrink: 0; }
        .pf-visual { aspect-ratio: 4/3; border-radius: var(--radius-lg); background: var(--brand-dark); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; box-shadow: var(--shadow-lg); }
        .pf-visual::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 30%, rgba(30,178,246,0.15), transparent 60%); }
        .pf-visual img { width: 100%; height: 100%; object-fit: cover; display: block; position: absolute; inset: 0; border-radius: inherit; }

        /* ═══ 电商工具 — Tab ═══ */
        .tool-tabs { display: flex; gap: 4px; margin: 0 auto 32px; background: var(--bg-muted); border-radius: var(--radius-full); padding: 4px; max-width: 520px; }
        .tool-tab { flex: 1; padding: 10px 20px; border-radius: var(--radius-full); border: none; background: transparent; cursor: pointer; font-size: 0.9375rem; font-weight: 500; color: var(--ink-secondary); transition: all var(--transition); }
        .tool-tab.active { background: var(--ink); color: #fff; box-shadow: var(--shadow); }
        .tool-tab-content { display: none; }
        .tool-tab-content.active { display: block; animation: pageFade 0.4s var(--ease); }
        .tool-showcase { background: var(--bg-muted); border-radius: var(--radius-lg); padding: clamp(2rem, 5vw, 3.5rem); display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
        .effect-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border); }
        .effect-stat .num { font-size: 1.75rem; font-weight: 800; color: var(--brand); }
        .effect-stat .desc { font-size: 0.8125rem; color: var(--ink-tertiary); margin-top: 4px; }
        .tool-visual { aspect-ratio: 16/10; border-radius: var(--radius-md); background: rgba(10,37,64,0.05); border: 1px dashed var(--border); display: flex; align-items: center; justify-content: center; }
        .tool-visual i { font-size: 2.5rem; color: var(--brand); }

        /* ═══ AIMALL ═══ */
        .lang-switch { display: flex; gap: 4px; margin-bottom: 24px; }
        .lang-switch button { padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg); cursor: pointer; font-size: 0.875rem; transition: all var(--transition); }
        .lang-switch button.active { background: var(--brand); color: #fff; border-color: var(--brand); }
        .aimall-hero { background: linear-gradient(135deg, var(--brand-subtle), var(--brand-light)); border-radius: var(--radius-xl); padding: clamp(2rem, 5vw, 3.5rem); margin-bottom: 40px; display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
        .aimall-hero-icon { width: 72px; height: 72px; border-radius: var(--radius-md); background: var(--brand); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 2rem; flex-shrink: 0; box-shadow: var(--shadow-brand); }
        .aimall-features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
        .aimall-feature { text-align: center; padding: 32px 20px; border-radius: var(--radius-md); background: var(--bg); border: 1px solid var(--border); transition: all var(--transition); }
        .aimall-feature:hover { border-color: var(--brand); transform: translateY(-4px); box-shadow: var(--shadow); }
        .aimall-feature.highlighted { border-color: var(--brand); border-width: 2px; }
        .aimall-feature i { font-size: 2rem; color: var(--brand); margin-bottom: 16px; }
        .aimall-feature h4 { font-size: 1.0625rem; margin-bottom: 8px; }
        .aimall-feature p { font-size: 0.875rem; color: var(--ink-secondary); }
        .payment-methods { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 24px; }
        .payment-badge { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: var(--radius-sm); background: var(--bg); border: 1px solid var(--border); font-weight: 600; font-size: 0.875rem; transition: all var(--transition); }
        .payment-badge:hover { border-color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow); }

        /* ═══ 私有化部署 ═══ */
        .deploy-hero { background: var(--brand-dark); border-radius: var(--radius-xl); padding: clamp(2rem, 5vw, 3.5rem); color: #fff; display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; margin-bottom: 40px; position: relative; overflow: hidden; }
        .deploy-hero::before { content: ''; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(30,178,246,0.15), transparent 70%); }
        .deploy-hero-content { position: relative; z-index: 2; }
        .deploy-hero h3 { color: #fff; margin-bottom: 12px; }
        .deploy-hero p { color: rgba(255,255,255,0.7); margin-bottom: 24px; }
        .deploy-hero ul li { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
        .deploy-hero ul li i { color: var(--brand); }
        .deploy-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-md); padding: 24px; position: relative; z-index: 2; }
        .deploy-card .label { font-size: 0.8125rem; color: var(--brand); font-weight: 600; margin-bottom: 8px; }
        .deploy-card .value { font-size: 1.125rem; font-weight: 600; color: #fff; }
        .deploy-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .deploy-feature { background: var(--bg); border: 1px solid var(--border); border-left: 3px solid var(--brand); border-radius: var(--radius-md); padding: 24px; transition: all var(--transition); }
        .deploy-feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .deploy-feature h4 { margin-bottom: 8px; }
        .deploy-feature p { font-size: 0.9375rem; color: var(--ink-secondary); }
        .timeline { position: relative; padding-left: 40px; }
        .timeline::before { content: ''; position: absolute; left: 15px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(to bottom, var(--brand), var(--border)); }
        .timeline-item { position: relative; padding-bottom: 32px; }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-item::before { content: ''; position: absolute; left: -33px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: var(--bg); border: 3px solid var(--brand); z-index: 2; transition: all var(--transition); }
        .timeline-item:hover::before { background: var(--brand); transform: scale(1.2); }
        .timeline-phase { font-size: 0.8125rem; font-weight: 600; color: var(--brand); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
        .timeline-item h4 { font-size: 1.0625rem; margin-bottom: 4px; }
        .timeline-item p { font-size: 0.9375rem; color: var(--ink-secondary); }
        .timeline-duration { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--brand); background: var(--brand-subtle); padding: 2px 10px; border-radius: var(--radius-full); margin-left: 8px; }

        /* ═══ 联系我们 ═══ */
        .contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
        .contact-info h3 { margin-bottom: 24px; }
        .contact-info ul li { display: flex; align-items: center; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border); }
        .contact-info ul li i { width: 40px; height: 40px; border-radius: var(--radius-sm); background: var(--brand-subtle); color: var(--brand); display: flex; align-items: center; justify-content: center; font-size: 1.125rem; flex-shrink: 0; }
        .contact-form { background: var(--bg-muted); padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--border); }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
        .form-group .req { color: #ef4444; }
        .form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); font-size: 0.9375rem; font-family: inherit; background: var(--bg); color: var(--ink); transition: all var(--transition); }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(30,178,246,0.12); }
        .form-feedback { font-size: 0.8125rem; margin-top: 6px; min-height: 18px; }
        .form-feedback.error { color: #ef4444; }
        .form-feedback.success { color: var(--success); }
        .faq-list { max-width: 760px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border); }
        .faq-question { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; cursor: pointer; font-size: 1.0625rem; font-weight: 600; color: var(--ink); transition: color var(--transition); gap: 16px; }
        .faq-question:hover { color: var(--brand); }
        .faq-question .chevron { transition: transform var(--transition); color: var(--brand); flex-shrink: 0; }
        .faq-item.open .faq-question .chevron { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s var(--ease); }
        .faq-answer-inner { padding: 0 0 20px; color: var(--ink-secondary); line-height: 1.7; }

        /* ═══ 页脚 ═══ */
        footer { background: var(--brand-dark); color: rgba(255,255,255,0.7); padding: clamp(3rem, 6vw, 5rem) 0 2rem; position: relative; overflow: hidden; }
        footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(30,178,246,0.5), transparent); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
        .footer-brand h4 { color: #fff; margin-bottom: 12px; font-size: 1.25rem; }
        .footer-brand p { max-width: 320px; font-size: 0.9375rem; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.6); display: flex; align-items: center; justify-content: center; transition: all var(--transition); font-size: 1rem; }
        .footer-social a:hover { background: var(--brand); color: #fff; transform: translateY(-3px); }
        .footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 0.9375rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.9375rem; transition: color var(--transition); cursor: pointer; }
        .footer-col ul li a:hover { color: var(--brand); }
        .copyright { text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.875rem; color: rgba(255,255,255,0.5); }

        /* ═══ 返回顶部 + 加载条 ═══ */
        .scroll-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center; cursor: pointer; border: none; z-index: 999; opacity: 0; transform: translateY(20px); transition: all var(--transition); box-shadow: var(--shadow-lg); }
        .scroll-top.visible { opacity: 1; transform: translateY(0); }
        .scroll-top:hover { background: var(--brand); transform: translateY(-4px); }
        .page-loader { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: transparent; z-index: 9999; }
        .page-loader::before { content: ''; position: absolute; top: 0; left: 0; height: 100%; width: 0%; background: var(--brand); box-shadow: 0 0 8px var(--brand); transition: width 0.3s ease; }
        .page-loader.loading::before { width: 70%; animation: loaderPulse 1.5s ease-in-out infinite; }
        .page-loader.done::before { width: 100%; transition: width 0.3s ease; }
        @keyframes loaderPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }

        /* ═══ 滚动揭示 ═══ */
        .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
        .reveal.in-view { opacity: 1; transform: translateY(0); }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }

        /* ═══ 星空粒子背景 ═══ */
        .trade-section { position: relative; overflow: hidden; }
        .star-canvas {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            z-index: 0; pointer-events: none;
        }
        .trade-section .container { position: relative; z-index: 1; }

        /* 流光装饰 */
        .trade-section::before {
            content: ''; position: absolute;
            top: 10%; left: -5%; width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(30,178,246,0.15) 0%, transparent 60%);
            border-radius: 50%; filter: blur(30px);
            animation: floatGlow 8s ease-in-out infinite alternate;
            z-index: 0; pointer-events: none;
        }
        .trade-section::after {
            content: ''; position: absolute;
            bottom: 10%; right: -5%; width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(79,195,247,0.12) 0%, transparent 60%);
            border-radius: 50%; filter: blur(30px);
            animation: floatGlow2 10s ease-in-out infinite alternate;
            z-index: 0; pointer-events: none;
        }
        @keyframes floatGlow {
            from { transform: translate(0, 0) scale(1); }
            to { transform: translate(60px, -40px) scale(1.1); }
        }
        @keyframes floatGlow2 {
            from { transform: translate(0, 0) scale(1); }
            to { transform: translate(-60px, 40px) scale(1.15); }
        }

        /* 交易卡片增强 — 玻璃态发光 */
        .trade-section .trade-card {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            transition: all 0.4s var(--ease);
        }
        .trade-section .trade-card:hover {
            background: rgba(30,178,246,0.12);
            border-color: rgba(30,178,246,0.4);
            box-shadow: 0 8px 32px rgba(30,178,246,0.2);
        }
        .trade-section .trade-card:hover .amount {
            text-shadow: 0 0 20px rgba(30,178,246,0.6);
        }
        .trade-section .trade-card .amount {
            transition: text-shadow 0.4s var(--ease);
        }

        /* ═══ 响应式补充 ═══ */
        @media (max-width: 968px) {
            .brand-grid { grid-template-columns: repeat(3, 1fr); }
            .capability-grid { grid-template-columns: 1fr; }
            .product-feature { grid-template-columns: 1fr; gap: 32px; }
            .product-feature:nth-child(even) .pf-text { order: 1; }
            .product-feature:nth-child(even) .pf-visual { order: 2; }
            .tool-showcase { grid-template-columns: 1fr; gap: 24px; }
            .aimall-features { grid-template-columns: repeat(2, 1fr); }
            .deploy-hero { grid-template-columns: 1fr; }
            .deploy-features { grid-template-columns: 1fr; }
            .contact-wrap { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .ai-hero { grid-template-columns: 1fr; }
            .stat-band-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
            .story-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.95); backdrop-filter: blur(20px); padding: 16px; gap: 4px; box-shadow: 0 8px 32px rgba(0,0,0,0.1); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 16px; }
            .menu-toggle { display: block; }
            .aimall-features { grid-template-columns: 1fr; }
            .brand-grid { grid-template-columns: repeat(2, 1fr); }
            .scroll-card { flex: 0 0 280px; }
            .stat-band-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
            .story-grid { grid-template-columns: 1fr; }
            .effect-stats { grid-template-columns: 1fr; gap: 12px; }
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
            .reveal { opacity: 1; transform: none; }
        }

        /* ═══ 站点级增强 — 无障碍与交互细节 ═══ */
        html { scroll-padding-top: calc(var(--nav-height) + 24px); }
        a:focus-visible, button:focus-visible,
        .tool-tab:focus-visible, .faq-question:focus-visible,
        .lang-switch button:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
        .trade-card { will-change: transform; }
        @media (max-width: 768px) {
            .menu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 10px; }
        }