/* ============================================================
   AI全自动获客工具平台 — 主站全局样式（全新响应式设计）
   适配：手机 / 平板 / 桌面
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --cyan: #06b6d4;
    --accent: #f97316;
    --ink: #0f172a;
    --ink-2: #1e293b;
    --body: #475569;
    --muted: #94a3b8;
    --bg: #f6f8fc;
    --card: #ffffff;
    --line: #e6eaf2;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --white: #ffffff;
    --gray: #94a3b8;
    --green: #10b981;
    --radius: 14px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
    --shadow: 0 12px 32px rgba(15, 23, 42, .08);
    --shadow-lg: 0 24px 60px rgba(15, 23, 42, .14);
    --gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    --gradient-warm: linear-gradient(135deg, #fb923c 0%, #f97316 55%, #ea580c 100%);
    --header-h: 68px;
    --font: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
    font-family: var(--font);
    color: var(--body);
    background: var(--white);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4, h5 { color: var(--ink); line-height: 1.3; font-weight: 700; }
section[id], div[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

.container {
    width: min(1200px, 100% - 40px);
    max-width: 1200px;
    margin: 0 auto;
}

/* ---------- 通用文字/区块 ---------- */
.text-gradient {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.section { padding: 88px 0; background: var(--white); }
.section-dark {
    background: linear-gradient(180deg, #0f172a 0%, #141d33 100%);
    color: #cbd5e1;
}
.section-dark h2, .section-dark h3, .section-dark h4 { color: #f1f5f9; }

.section-header { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-header h2 { font-size: clamp(1.55rem, 3.6vw, 2.35rem); font-weight: 800; margin-bottom: 14px; }
.section-header p { color: var(--body); font-size: 1.05rem; }
.section-dark .section-header p { color: #94a3b8; }

.mini-badge {
    display: inline-flex; align-items: center; gap: .5rem;
    padding: .45rem 1rem; border-radius: 999px;
    background: rgba(99, 102, 241, .12); border: 1px solid rgba(99, 102, 241, .25);
    color: #c7d2fe; font-size: .85rem; font-weight: 500;
}
.section-dark .mini-badge svg { color: #a5b4fc; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
    padding: .8rem 1.75rem; border-radius: 999px;
    font-size: 1rem; font-weight: 600; line-height: 1.2;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
    white-space: nowrap; text-align: center;
}
.btn-primary {
    background: var(--gradient); color: #fff;
    box-shadow: 0 8px 22px rgba(99, 102, 241, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(99, 102, 241, .45); }
.btn-secondary {
    background: #fff; color: var(--ink); border: 1.5px solid var(--line);
    box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.section-dark .btn-secondary { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.18); color: #f1f5f9; }
.section-dark .btn-secondary:hover { border-color: var(--primary-light); color: #fff; }
.btn-white { background: #fff; color: var(--primary-dark); box-shadow: 0 10px 26px rgba(0,0,0,.18); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(0,0,0,.24); }
.btn-lg { padding: 1rem 2.2rem; font-size: 1.08rem; }
.btn-block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255, 255, 255, .82);
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: box-shadow .3s ease, background .3s ease, border-color .3s ease;
}
.header.scrolled {
    background: rgba(255, 255, 255, .95);
    border-bottom-color: var(--line);
    box-shadow: 0 4px 20px rgba(15, 23, 42, .06);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-h); gap: 1rem;
}
.logo {
    display: flex; align-items: center; gap: .6rem;
    font-size: 1.2rem; font-weight: 800; color: var(--ink);
    flex-shrink: 0;
}
.logo-icon {
    width: 38px; height: 38px; border-radius: 11px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gradient); font-size: 1.15rem;
    box-shadow: 0 6px 16px rgba(99, 102, 241, .35);
}
.nav { display: flex; align-items: center; gap: 1.9rem; }
.nav-link {
    position: relative; font-size: .95rem; font-weight: 500; color: var(--ink-2);
    padding: .35rem 0; transition: color .2s;
}
.nav-link::after {
    content: ''; position: absolute; left: 50%; bottom: -2px; width: 0; height: 2px;
    border-radius: 2px; background: var(--gradient); transition: width .25s ease, left .25s ease;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; left: 0; }
.header-cta { display: flex; align-items: center; gap: .8rem; flex-shrink: 0; }
.header-cta .btn-primary { padding: .6rem 1.35rem; font-size: .92rem; }

.mobile-menu-btn {
    display: none; flex-direction: column; justify-content: center; gap: 5px;
    width: 42px; height: 42px; border-radius: 10px; padding: 0 10px;
}
.mobile-menu-btn span {
    display: block; height: 2px; width: 100%; border-radius: 2px;
    background: var(--ink); transition: transform .3s ease, opacity .3s ease;
}
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
    position: relative; overflow: hidden;
    padding: calc(var(--header-h) + 72px) 0 84px;
    background:
        radial-gradient(600px 320px at 12% -10%, rgba(99, 102, 241, .12), transparent 60%),
        radial-gradient(560px 300px at 92% 8%, rgba(6, 182, 212, .12), transparent 60%),
        linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
    position: absolute; inset: 0; pointer-events: none; opacity: .55;
    background-image:
        linear-gradient(rgba(99, 102, 241, .06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, .06) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, #000 30%, transparent 75%);
}
.hero-content { position: relative; text-align: center; max-width: 880px; margin: 0 auto; }
.hero-badge {
    display: inline-flex; align-items: center; gap: .55rem;
    padding: .5rem 1.1rem; border-radius: 999px;
    background: #fff; border: 1px solid rgba(99, 102, 241, .2);
    box-shadow: var(--shadow-sm);
    font-size: .9rem; font-weight: 500; color: var(--ink-2);
    margin-bottom: 1.6rem;
}
.hero-badge span {
    width: 8px; height: 8px; border-radius: 50%; background: var(--green);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, .5); animation: pulse 2s infinite;
}
.hero h1 {
    font-size: clamp(1.9rem, 5.2vw, 3.3rem); font-weight: 800;
    line-height: 1.25; color: var(--ink); margin-bottom: 1.3rem;
}
.hero-subtitle {
    font-size: clamp(.98rem, 2vw, 1.12rem); color: var(--body);
    max-width: 680px; margin: 0 auto 2.2rem;
}
.hero-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1rem; margin-top: 3.2rem;
    max-width: 760px; margin-left: auto; margin-right: auto;
}
.hero-stat {
    background: rgba(255, 255, 255, .75); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 1.1rem .6rem;
    box-shadow: var(--shadow-sm); backdrop-filter: blur(6px);
}
.hero-stat-value {
    font-size: clamp(1.3rem, 3vw, 1.75rem); font-weight: 800;
    background: var(--gradient); -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; line-height: 1.2;
}
.hero-stat-label { font-size: .85rem; color: var(--muted); margin-top: .25rem; }

/* ---------- 行业 Logo 带 ---------- */
.section-logos {
    padding: 72px 0;
    background: linear-gradient(180deg, var(--dark-2) 0%, rgba(15, 23, 42, .98) 100%);
    border-top: 1px solid rgba(255, 255, 255, .06);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.section-logos .container > div:first-child { text-align: center; margin-bottom: 2.6rem; }
.section-logos .mini-badge { margin-bottom: 1rem; }
.section-logos .mini-badge svg { color: var(--primary-light); }
.section-logos h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem); margin-bottom: .5rem;
    background: linear-gradient(90deg, #818cf8 0%, #22d3ee 50%, #818cf8 100%);
    background-size: 200% auto; -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; animation: shimmer 3s linear infinite;
}
.section-logos p { color: #94a3b8; font-size: .92rem; }
.logo-banner {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.logo-item {
    display: flex; align-items: center; justify-content: center; gap: .65rem;
    padding: 1.1rem .8rem; border-radius: var(--radius);
    background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .09);
    color: #cbd5e1; font-weight: 500; font-size: .95rem;
    transition: border-color .25s, background .25s, transform .25s;
}
.logo-item svg { color: #818cf8; flex-shrink: 0; }
.logo-item:hover { border-color: rgba(129, 140, 248, .5); background: rgba(99, 102, 241, .1); transform: translateY(-3px); }

/* ---------- 信任条 ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-item {
    display: flex; align-items: center; gap: .75rem;
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.1rem 1.25rem; font-weight: 500; color: var(--ink-2); font-size: .95rem;
    box-shadow: var(--shadow-sm);
}
.trust-icon {
    width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
    background: linear-gradient(135deg, #34d399, #10b981); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: .85rem; font-weight: 700;
}

/* ---------- 痛点 ---------- */
.pain-points { background: linear-gradient(180deg, #f8faff 0%, #fff 100%); }
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pain-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 1.8rem; box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    position: relative; overflow: hidden;
}
.pain-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, #f43f5e, #f97316);
    transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.pain-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.pain-card:hover::before { transform: scaleX(1); }
.pain-card h4 { font-size: 1.08rem; margin-bottom: .6rem; color: var(--ink); }
.pain-card p { font-size: .93rem; color: var(--body); }

/* ---------- 对比表 ---------- */
.comparison-table-container {
    background: #fff; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow); border: 1px solid var(--line);
    -webkit-overflow-scrolling: touch;
}
.comparison-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.comparison-table th, .comparison-table td { padding: 1.05rem 1.25rem; text-align: center; font-size: .95rem; }
.comparison-table thead th { font-size: 1.02rem; font-weight: 700; padding: 1.25rem; }
.comparison-header { background: #f8fafc; color: var(--ink); }
.comparison-header.traditional { color: #b45309; background: #fffbeb; }
.comparison-header.ai { color: #4338ca; background: #eef2ff; }
.comparison-table tbody tr { border-top: 1px solid var(--line); transition: background .2s; }
.comparison-table tbody tr:nth-child(even) { background: #fafbfe; }
.comparison-label { font-weight: 600; color: var(--ink); text-align: left; background: #f8fafc !important; position: sticky; left: 0; z-index: 1; }
.comparison-value.traditional { color: #b45309; }
.comparison-value.ai { color: #4338ca; font-weight: 600; }

/* ---------- 核心功能（深色） ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
    background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .08);
    border-radius: var(--radius-lg); padding: 2rem;
    transition: transform .3s ease, border-color .3s ease, background .3s ease;
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(129, 140, 248, .45); background: rgba(99, 102, 241, .12); }
.feature-icon {
    width: 58px; height: 58px; border-radius: 16px; margin-bottom: 1.1rem;
    display: flex; align-items: center; justify-content: center; font-size: 1.7rem;
    background: linear-gradient(135deg, rgba(99,102,241,.25), rgba(6,182,212,.2));
    border: 1px solid rgba(129, 140, 248, .3);
}
.feature-card h3 { font-size: 1.15rem; margin-bottom: .65rem; }
.feature-card p { font-size: .93rem; color: #94a3b8; }

/* ---------- 产品 ---------- */
#products { background: var(--bg); }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 2.2rem 2rem; box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-icon { font-size: 2.6rem; margin-bottom: 1rem; }
.product-card h3 { font-size: 1.25rem; margin-bottom: .7rem; }
.product-card > p { font-size: .94rem; color: var(--body); margin-bottom: 1.2rem; }
.product-features { display: flex; flex-direction: column; gap: .7rem; margin-top: auto; }
.product-features li {
    position: relative; padding-left: 1.5rem; font-size: .92rem; color: var(--ink-2);
}
.product-features li::before {
    content: ''; position: absolute; left: 0; top: .45em;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--gradient); box-shadow: 0 0 0 4px rgba(99, 102, 241, .12);
}

/* ---------- 操作步骤（深色） ---------- */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-card {
    position: relative; text-align: center;
    background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .08);
    border-radius: var(--radius-lg); padding: 2.2rem 1.4rem 1.8rem;
    transition: transform .3s ease, border-color .3s;
}
.step-card:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, .4); }
.step-number {
    width: 52px; height: 52px; margin: 0 auto 1rem; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.35rem; font-weight: 800; color: #fff;
    background: var(--gradient); box-shadow: 0 8px 20px rgba(99, 102, 241, .4);
}
.step-card h4 { font-size: 1.08rem; margin-bottom: .5rem; }
.step-card p { font-size: .9rem; color: #94a3b8; }

/* ---------- 数据统计 ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 2.2rem 1rem; text-align: center; box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
}
.stat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.stat-icon { font-size: 2.2rem; margin-bottom: .7rem; }
.stat-value {
    font-size: 2rem; font-weight: 800; line-height: 1.2;
    background: var(--gradient); -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-label { color: var(--muted); font-size: .92rem; margin-top: .3rem; }

/* ---------- 成功案例（深色） ---------- */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 2rem; }
.testimonial-card {
    background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .08);
    border-radius: var(--radius-lg); padding: 2rem;
    display: flex; flex-direction: column; gap: 1rem;
    transition: transform .3s ease, border-color .3s;
}
.testimonial-card:hover { transform: translateY(-5px); border-color: rgba(129, 140, 248, .45); }
.testimonial-badge {
    align-self: flex-start; padding: .3rem .9rem; border-radius: 999px;
    background: rgba(99, 102, 241, .2); color: #c7d2fe;
    font-size: .82rem; font-weight: 600; border: 1px solid rgba(129, 140, 248, .3);
}
.testimonial-content { color: #cbd5e1; font-size: .95rem; flex: 1; }
.testimonial-result {
    background: rgba(16, 185, 129, .12); border: 1px solid rgba(16, 185, 129, .25);
    color: #6ee7b7; border-radius: 10px; padding: .7rem 1rem; font-size: .88rem;
}
.testimonial-author { display: flex; align-items: center; gap: .8rem; }
.testimonial-avatar {
    width: 46px; height: 46px; border-radius: 50%; flex-shrink: 0;
    background: var(--gradient); color: #fff; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.testimonial-info h5 { color: #f1f5f9; font-size: .98rem; }
.testimonial-info span { color: #94a3b8; font-size: .82rem; }

/* ---------- FAQ ---------- */
#faq { background: var(--bg); }
.faq-list { max-width: 840px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; transition: box-shadow .25s, border-color .25s;
}
.faq-item.active { border-color: rgba(99, 102, 241, .4); box-shadow: var(--shadow-sm); }
.faq-question {
    width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    padding: 1.15rem 1.4rem; text-align: left;
    font-size: 1rem; font-weight: 600; color: var(--ink);
}
.faq-icon {
    flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: #eef2ff; color: var(--primary); font-size: 1.25rem; line-height: 1;
    transition: transform .3s ease, background .3s;
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.active .faq-answer { max-height: 600px; }
.faq-answer-inner { padding: 0 1.4rem 1.3rem; color: var(--body); font-size: .94rem; }

/* ---------- 客户评价 ---------- */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.review-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 1.8rem; box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    display: flex; flex-direction: column; gap: 1rem;
}
.review-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.review-header { display: flex; align-items: center; gap: .9rem; }
.review-avatar {
    width: 50px; height: 50px; border-radius: 50%; flex-shrink: 0;
    color: #fff; font-weight: 700; font-size: 1.05rem;
    display: flex; align-items: center; justify-content: center;
}
.review-name { font-size: 1.02rem; }
.review-stars { font-size: .85rem; letter-spacing: 2px; margin-top: 2px; }
.review-content { color: var(--body); font-size: .93rem; flex: 1; }
.review-metrics { display: flex; gap: .8rem; }
.review-metric {
    flex: 1; background: #f8faff; border: 1px solid var(--line);
    border-radius: 10px; padding: .65rem .5rem; text-align: center;
    display: flex; flex-direction: column; gap: .15rem;
}
.review-metric-label { font-size: .78rem; color: var(--muted); }
.review-metric-value { font-size: 1.05rem; font-weight: 800; color: var(--primary); }

/* ---------- CTA 区 ---------- */
.cta-section {
    background: var(--gradient-warm);
    padding: 80px 0; position: relative; overflow: hidden;
}
.cta-section::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(500px 240px at 85% 0%, rgba(255,255,255,.18), transparent 60%);
}
.cta-content { position: relative; text-align: center; color: #fff; max-width: 680px; margin: 0 auto; }
.cta-badge {
    display: inline-block; padding: .45rem 1.2rem; border-radius: 999px;
    background: rgba(255, 255, 255, .2); border: 1px solid rgba(255, 255, 255, .35);
    font-size: .9rem; font-weight: 600; margin-bottom: 1.2rem;
}
.cta-content h2 { color: #fff; font-size: clamp(1.5rem, 3.6vw, 2.2rem); margin-bottom: .9rem; }
.cta-content p { color: rgba(255, 255, 255, .92); font-size: 1.05rem; margin-bottom: 1.8rem; }
.cta-buttons { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.cta-checks, .cta-features {
    margin-top: 1.8rem; display: flex; justify-content: center; gap: 1.6rem; flex-wrap: wrap;
}
.cta-check { display: flex; align-items: center; gap: .45rem; color: rgba(0,0,0,.72); font-weight: 500; font-size: .92rem; }
.cta-features span {
    display: inline-flex; align-items: center; gap: .35rem;
    color: rgba(255,255,255,.95); font-size: .92rem; font-weight: 500;
}

/* ---------- 悬浮咨询按钮 ---------- */
.floating-cta { position: fixed; right: 22px; bottom: 26px; z-index: 90; }
.floating-btn {
    display: inline-flex; align-items: center; gap: .45rem;
    background: var(--gradient-warm); color: #fff;
    padding: .85rem 1.5rem; border-radius: 999px;
    font-weight: 700; font-size: .98rem;
    box-shadow: 0 12px 30px rgba(249, 115, 22, .45);
    animation: floatPulse 2.4s infinite;
    transition: transform .25s;
}
.floating-btn:hover { transform: translateY(-3px) scale(1.03); }

/* ---------- 文章卡片网格 ---------- */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card {
    display: block; background: #fff; border-radius: var(--radius-lg);
    overflow: hidden; border: 1px solid rgba(255,255,255,.08);
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
}
.section-dark .article-card { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.09); }
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.article-img {
    height: 200px; background-size: cover; background-position: center;
    background-color: #e2e8f0; position: relative;
}
.article-info { padding: 1.25rem 1.35rem 1.5rem; }
.article-date { display: block; font-size: .82rem; color: var(--muted); margin-bottom: .5rem; }
.section-dark .article-date { color: #64748b; }
.article-info h4 {
    font-size: 1rem; line-height: 1.55; color: var(--ink);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden; min-height: 3.1em;
}
.section-dark .article-info h4 { color: #f1f5f9; }

/* ---------- 文章列表（横向卡） ---------- */
.article-list { display: flex; flex-direction: column; gap: 22px; }
.article-card-h {
    display: grid; grid-template-columns: 300px 1fr;
    background: #fff; border-radius: var(--radius-lg); overflow: hidden;
    border: 1px solid rgba(255,255,255,.08); box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
}
.article-card-h:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.article-card-h-image { background-size: cover; background-position: center; min-height: 200px; background-color: #e2e8f0; }
.article-card-h-body { padding: 1.8rem 2rem; display: flex; flex-direction: column; gap: .7rem; }
.article-card-h-date { font-size: .82rem; color: #64748b; }
.article-card-h-title { font-size: 1.2rem; color: var(--ink); line-height: 1.45; }
.article-card-h-desc {
    color: var(--body); font-size: .93rem;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-card-h-link { margin-top: auto; color: var(--primary); font-weight: 600; font-size: .92rem; }

/* 深色区块中的白色横排文章卡：标题/日期/正文保持深色，
   防止被 .section-dark h3 浅色规则染白导致白卡上看不清 */
.section-dark .article-card-h-title { color: var(--ink); }
.section-dark .article-card-h-desc { color: var(--body); }
.section-dark .article-card-h-date { color: #64748b; }
.section-dark .article-card-h-link { color: var(--primary-dark); }

/* ---------- 城市 ---------- */
.city-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.city-tag {
    display: inline-flex; align-items: center;
    padding: .55rem 1.15rem; border-radius: 999px;
    background: #fff; border: 1px solid var(--line); color: var(--ink-2);
    font-size: .92rem; font-weight: 500;
    transition: all .25s ease;
}
.city-tag:hover { border-color: var(--primary); color: var(--primary); background: #eef2ff; transform: translateY(-2px); }
.section-dark .city-tag { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.12); color: #cbd5e1; }
.section-dark .city-tag:hover { background: rgba(99,102,241,.18); border-color: rgba(129,140,248,.5); color: #fff; }
.city-search-wrap { display: flex; justify-content: center; margin-bottom: 2.2rem; }
.city-search-input {
    width: 100%; max-width: 420px; padding: .85rem 1.2rem;
    background: #fff; border: 1.5px solid var(--line); border-radius: 12px;
    color: var(--ink); font-size: 1rem; font-family: inherit;
    transition: border-color .25s, box-shadow .25s;
}
.city-search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99,102,241,.12); }
.city-search-input::placeholder { color: var(--muted); }

/* ---------- 面包屑 ---------- */
.breadcrumb-bar { background: #fff; border-bottom: 1px solid var(--line); padding: .85rem 0; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; font-size: .88rem; color: var(--muted); }
.breadcrumb a { color: var(--primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-separator { color: #cbd5e1; }
.breadcrumb-current { color: var(--ink-2); }

/* ---------- 分页 ---------- */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 3rem; }
.pagination a {
    min-width: 42px; height: 42px; padding: 0 14px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 10px; background: #fff; border: 1px solid var(--line);
    color: var(--ink-2); font-weight: 600; font-size: .92rem;
    transition: all .2s;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination a.active { background: var(--gradient); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(99,102,241,.35); }
.pagination .btn { border-radius: 999px; padding: .7rem 1.6rem; }

/* ---------- 页脚 ---------- */
.footer { background: linear-gradient(180deg, #0f172a 0%, #0b1220 100%); color: #94a3b8; padding-top: 64px; }
.footer-grid {
    display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 2.5rem;
    padding-bottom: 2.5rem;
}
.footer-brand p { margin-top: 1.1rem; font-size: .9rem; line-height: 1.85; color: #94a3b8; max-width: 360px; }
.footer-brand .logo { color: #f1f5f9; }
.footer-column h4 { color: #f1f5f9; font-size: 1rem; margin-bottom: 1.1rem; }
.footer-links { display: flex; flex-direction: column; gap: .7rem; }
.footer-links a { color: #94a3b8; font-size: .92rem; transition: color .2s, transform .2s; }
.footer-links a:hover { color: #fff; transform: translateX(3px); }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 1.4rem 0; display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; flex-wrap: wrap; font-size: .86rem;
}
.footer-bottom p { color: #64748b; }
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #fff; }
.footer-social { display: flex; gap: .7rem; }
.footer-social a {
    width: 38px; height: 38px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
    font-size: 1rem; transition: background .25s, transform .25s;
}
.footer-social a:hover { background: var(--primary); transform: translateY(-3px); }

/* ---------- 微信弹窗 ---------- */
.modal-overlay {
    position: fixed; inset: 0; z-index: 200;
    background: rgba(15, 23, 42, .62); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    padding: 20px; opacity: 0; pointer-events: none; transition: opacity .3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content {
    background: #fff; border-radius: 22px; padding: 2.4rem 2rem 2rem;
    width: 100%; max-width: 420px; text-align: center; position: relative;
    transform: translateY(24px) scale(.96); transition: transform .3s ease;
    box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal-content { transform: translateY(0) scale(1); }
.modal-close {
    position: absolute; top: 10px; right: 14px;
    width: 38px; height: 38px; border-radius: 50%;
    font-size: 1.6rem; line-height: 1; color: var(--muted);
    display: flex; align-items: center; justify-content: center;
    transition: background .2s, color .2s;
}
.modal-close:hover { background: #f1f5f9; color: var(--ink); }
.modal-icon {
    width: 64px; height: 64px; margin: 0 auto 1rem; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; font-size: 1.8rem;
    background: linear-gradient(135deg, #dcfce7, #bbf7d0);
}
.modal-content h3 { font-size: 1.3rem; margin-bottom: .5rem; }
.modal-content > p { color: var(--body); font-size: .92rem; margin-bottom: 1.3rem; }
.wechat-id-box {
    border: 2px dashed #c7d2fe; background: #f5f7ff; border-radius: 14px;
    padding: 1rem; margin-bottom: 1.2rem;
}
.wechat-id-box span { font-family: Consolas, 'Courier New', monospace; font-size: 1.35rem; font-weight: 700; color: var(--primary-dark); letter-spacing: 1px; word-break: break-all; }
.copy-btn {
    width: 100%; padding: .9rem; border-radius: 12px;
    background: var(--gradient); color: #fff;
    font-size: 1rem; font-weight: 700;
    box-shadow: 0 8px 20px rgba(99, 102, 241, .35);
    transition: transform .2s, box-shadow .2s;
}
.copy-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(99, 102, 241, .45); }

/* ---------- Toast ---------- */
.toast, .city-toast {
    position: fixed; left: 50%; bottom: 36px; z-index: 300;
    transform: translate(-50%, 20px);
    background: rgba(15, 23, 42, .95); color: #fff;
    padding: .8rem 1.6rem; border-radius: 999px;
    font-size: .92rem; font-weight: 500;
    opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
    box-shadow: 0 12px 30px rgba(0,0,0,.25);
    max-width: calc(100vw - 40px); text-align: center;
}
.toast.show, .city-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 入场动画 ---------- */
.fade-in, .slide-in-left, .slide-in-right {
    opacity: 0; transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
}
.slide-in-left { transform: translateX(-32px); }
.slide-in-right { transform: translateX(32px); }
.fade-in.visible, .slide-in-left.visible, .slide-in-right.visible {
    opacity: 1; transform: translate(0, 0);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, .5); }
    70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}
@keyframes shimmer {
    to { background-position: 200% center; }
}
@keyframes floatPulse {
    0%, 100% { box-shadow: 0 12px 30px rgba(249, 115, 22, .45); }
    50% { box-shadow: 0 12px 38px rgba(249, 115, 22, .7); }
}

/* ============================================================
   响应式 — 平板
   ============================================================ */
@media (max-width: 1024px) {
    .nav { gap: 1.2rem; }
    .nav-link { font-size: .9rem; }
    .features-grid, .pain-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .products-grid, .testimonials-grid, .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid, .stats-grid, .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .logo-banner { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

/* ============================================================
   响应式 — 手机
   ============================================================ */
@media (max-width: 768px) {
    .section { padding: 56px 0; }
    .container { width: calc(100% - 32px); }

    /* 移动端抽屉菜单 */
    .mobile-menu-btn { display: flex; }
    .nav {
        position: fixed; top: var(--header-h); right: 0;
        width: min(320px, 84vw); height: calc(100vh - var(--header-h));
        background: #fff; flex-direction: column; align-items: flex-start;
        gap: 0; padding: 1rem 1.6rem 2rem;
        box-shadow: -12px 0 40px rgba(15, 23, 42, .15);
        transform: translateX(105%); transition: transform .32s ease;
        overflow-y: auto;
    }
    .nav.active { transform: translateX(0); }
    .nav-link { width: 100%; padding: .95rem 0; font-size: 1.05rem; border-bottom: 1px solid #f1f5f9; }
    .nav-link::after { display: none; }
    .header-cta .btn-primary { display: none; }

    /* Hero */
    .hero { padding: calc(var(--header-h) + 44px) 0 56px; }
    .hero-badge { font-size: .8rem; padding: .45rem .9rem; margin-bottom: 1.2rem; }
    .hero-actions { flex-direction: column; align-items: stretch; max-width: 340px; margin: 0 auto; }
    .hero-actions .btn { width: 100%; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 2.2rem; }
    .hero-stat { padding: .9rem .4rem; }

    /* 网格全部单列 / 双列 */
    .logo-banner { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .logo-item { font-size: .85rem; padding: .9rem .5rem; flex-direction: column; text-align: center; gap: .4rem; }
    .trust-grid { grid-template-columns: 1fr; gap: 10px; }
    .pain-grid, .features-grid, .products-grid, .steps-grid,
    .stats-grid, .testimonials-grid, .reviews-grid, .articles-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }

    /* 横向文章卡变竖排 */
    .article-card-h { grid-template-columns: 1fr; }
    .article-card-h-image { min-height: 180px; }
    .article-card-h-body { padding: 1.3rem 1.25rem; }
    .article-card-h-title { font-size: 1.05rem; }

    /* CTA */
    .cta-section { padding: 56px 0; }
    .cta-buttons { flex-direction: column; max-width: 340px; margin: 0 auto; }
    .cta-buttons .btn { width: 100%; }
    .cta-checks, .cta-features { gap: .8rem 1.2rem; }

    /* 悬浮按钮：移动端贴底全宽 */
    .floating-cta { left: 16px; right: 16px; bottom: 16px; }
    .floating-btn { width: 100%; justify-content: center; padding: .95rem; font-size: 1.02rem; }

    /* 页脚 */
    .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
    .footer-bottom { flex-direction: column; text-align: center; }

    /* 弹窗 */
    .modal-content { padding: 2rem 1.4rem 1.6rem; }
    .toast, .city-toast { bottom: 84px; }

    .section-header { margin-bottom: 40px; }
}

@media (max-width: 400px) {
    .hero h1 { font-size: 1.7rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .logo-banner { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 无障碍：减弱动画 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
    .fade-in, .slide-in-left, .slide-in-right { opacity: 1; transform: none; }
}