/* 南京辉堂网络科技有限公司官网前台样式 */
:root {
  --ink: #0b1220;
  --muted: #5b667a;
  --line: #d8dee8;
  --soft: #f5f8fc;
  --blue: #146ef5;
  --blue-dark: #0757cf;
  --green: #0fba73;
  --orange: #ff7a1a;
  --purple: #7257ff;
  --red: #e84040;
  --white: #ffffff;
  --shadow: 0 30px 70px rgba(15, 35, 75, .12), 0 8px 18px rgba(15, 35, 75, .08);
  --shadow-sm: 0 8px 24px rgba(15, 35, 75, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; font-size: 14px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(20,110,245,.10), transparent 28%),
    radial-gradient(circle at 92% 10%, rgba(15,186,115,.10), transparent 26%),
    var(--white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  animation: fadeIn .25s ease;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.section { padding: 72px 0; }
.section-soft { background: var(--soft); }
.section-label { color: var(--blue); font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 10px; }
.section-title { font-size: 2.2rem; line-height: 1.18; margin: 0; letter-spacing: 0; }
.section-desc { color: var(--muted); font-size: 1.05rem; max-width: 720px; margin: 16px 0 0; }
.center { text-align: center; }
.center .section-desc { margin-left: auto; margin-right: auto; }

/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid rgba(216,222,232,.75);
  backdrop-filter: blur(18px);
}
.navbar .container { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo-icon { width: 38px; height: 38px; border-radius: 8px; background: linear-gradient(135deg, var(--blue), var(--green)); box-shadow: 0 12px 24px rgba(20,110,245,.22); position: relative; flex: 0 0 auto; }
.logo-icon::after { content: ""; position: absolute; inset: 10px; border: 2px solid #fff; border-left: 0; border-bottom: 0; }
.site-name { margin: 0; font-size: 1.05rem; line-height: 1.1; font-weight: 800; }
.logo-text span { display: block; color: var(--muted); font-size: .78rem; white-space: nowrap; }
.nav-links { display: none; align-items: center; list-style: none; gap: 8px; padding: 0; margin: 0; }
.nav-links a, .mobile-menu a { display: flex; align-items: center; min-height: 44px; padding: 10px 12px; color: #334155; font-weight: 600; border-radius: 6px; }
.nav-links a:hover, .nav-links a.active, .mobile-menu a.active { color: var(--blue); background: rgba(20,110,245,.08); }
.mobile-menu-btn { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); background: #fff; border-radius: 6px; cursor: pointer; }
.mobile-menu-btn span, .mobile-menu-btn::before, .mobile-menu-btn::after { content: ""; width: 20px; height: 2px; background: var(--ink); display: block; margin: 3px 0; }
.mobile-menu { display: none; padding: 8px 0 16px; border-top: 1px solid var(--line); }
.mobile-menu.open { display: grid; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 12px 18px; border-radius: 6px; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateX(4px); }
.btn-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 26px rgba(20,110,245,.22); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.btn-dark { color: #fff; background: var(--ink); }

/* Hero区 */
.hero { padding: 104px 0 46px; background: linear-gradient(135deg, #eef5ff 0%, #f7fbff 42%, #fff 78%); overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.16), rgba(255,255,255,0)); pointer-events: none; }
.hero .container { position: relative; }
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero h1 { margin: 0; font-size: 2.7rem; line-height: 1.08; letter-spacing: 0; max-width: 820px; }
.hero h1 span { color: var(--blue); }
.hero-lead { color: #344055; font-size: 1.15rem; max-width: 720px; margin: 18px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-proof { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 28px; max-width: 720px; }
.proof-item { border: 1px solid var(--line); background: rgba(255,255,255,.72); border-radius: 8px; padding: 14px; transition: transform .2s ease, box-shadow .2s ease; }
.proof-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.proof-item strong { display: block; font-size: 1.1rem; }
.proof-item span { color: var(--muted); font-size: .9rem; }
.hero-panel { background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); padding: 18px; }
.audit-card { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.audit-head { display: flex; justify-content: space-between; gap: 12px; padding: 14px 16px; background: var(--ink); color: #fff; }
.audit-row { display: grid; grid-template-columns: 92px 1fr auto; gap: 10px; align-items: center; padding: 14px 16px; border-top: 1px solid var(--line); }
.audit-row span { color: var(--muted); font-size: .9rem; }
.audit-bar { height: 8px; background: #e7edf7; border-radius: 999px; overflow: hidden; }
.audit-bar i { display: block; height: 100%; width: var(--w); background: var(--c); border-radius: 999px; transition: width .8s ease; }
.audit-note { margin: 14px 0 0; color: var(--muted); font-size: .9rem; }

/* 轮播图 */
.banner-slider-section { padding: 20px 0 0; background: #fff; }
.banner-slider { position: relative; overflow: hidden; border-radius: 8px; border: 1px solid var(--line); background: #0b1220; min-height: 260px; }
.banner-slides { display: flex; transition: transform .55s ease; }
.banner-slide { min-width: 100%; display: grid; align-items: center; min-height: 300px; padding: 32px; color: #fff; background-size: cover; background-position: center; position: relative; }
.banner-slide::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,18,32,.88), rgba(11,18,32,.38)); }
.banner-content { position: relative; max-width: 680px; }
.banner-content h2 { font-size: 2rem; line-height: 1.2; margin: 0 0 10px; }
.banner-content p { color: rgba(255,255,255,.82); margin: 0 0 18px; }
.banner-btn { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border: 0; border-radius: 50%; color: var(--ink); background: rgba(255,255,255,.92); cursor: pointer; font-size: 1.5rem; }
.banner-prev { left: 14px; }
.banner-next { right: 14px; }
.banner-dots { position: absolute; left: 0; right: 0; bottom: 14px; display: flex; justify-content: center; gap: 8px; }
.banner-dot { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.45); cursor: pointer; }
.banner-dot.active { background: #fff; }

/* 痛点区 */
.pain-grid, .advantage-grid, .business-grid, .process-grid { display: grid; gap: 18px; margin-top: 34px; }
.pain-card, .advantage-card, .business-card, .process-card, .contact-card, .news-item { background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.pain-card { padding: 22px; position: relative; overflow: hidden; box-shadow: 0 14px 34px rgba(15,35,75,.06); transition: transform .2s ease, box-shadow .2s ease; }
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pain-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: linear-gradient(180deg, var(--red), var(--orange)); }
.pain-card .tag { display: inline-flex; padding: 4px 8px; border-radius: 4px; color: #fff; background: var(--red); font-size: .8rem; font-weight: 700; margin-bottom: 16px; }
.pain-card h3, .advantage-card h3, .business-card h3, .process-card h3 { margin: 0 0 8px; font-size: 1.25rem; }
.pain-card p, .advantage-card p, .business-card p, .process-card p { margin: 0; color: var(--muted); }

/* 商业模式区 */
.model-band { background: linear-gradient(135deg, #0b1220 0%, #0f1d35 50%, #0b1220 100%); color: #fff; padding: 80px 0; position: relative; overflow: hidden; }
.model-band::before { content: ""; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(20,110,245,.12), transparent 70%); pointer-events: none; }
.model-band::after { content: ""; position: absolute; bottom: -30%; left: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(15,186,115,.10), transparent 70%); pointer-events: none; }
.model-band .container { position: relative; z-index: 1; }
.model-steps { display: grid; gap: 0; margin-top: 48px; align-items: stretch; }
.model-step { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: 12px; padding: 28px 24px; text-align: center; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.model-step:hover { transform: translateY(-4px); background: rgba(255,255,255,.10); border-color: rgba(255,255,255,.22); }
.model-step-num { width: 40px; height: 40px; display: inline-grid; place-items: center; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 900; font-size: 1.2rem; margin-bottom: 16px; }
.model-step-price { font-size: 2rem; font-weight: 900; color: var(--green); margin-bottom: 8px; line-height: 1.1; }
.model-step h3 { margin: 0 0 10px; font-size: 1.3rem; color: #fff; }
.model-step p { margin: 0; color: rgba(255,255,255,.68); font-size: .95rem; line-height: 1.6; }
.model-step-tag { display: inline-block; margin-top: 16px; padding: 6px 14px; border-radius: 20px; background: rgba(15,186,115,.15); color: var(--green); font-size: .82rem; font-weight: 700; border: 1px solid rgba(15,186,115,.25); }
.model-step-arrow { display: none; align-items: center; justify-content: center; font-size: 2rem; color: rgba(255,255,255,.3); padding: 0 8px; }

/* 服务卡片 */
.business-card { overflow: hidden; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease; box-shadow: 0 14px 34px rgba(15,35,75,.05); }
.business-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.business-card-cover { min-height: 150px; padding: 18px; color: #fff; display: flex; justify-content: space-between; align-items: flex-start; background: linear-gradient(135deg, var(--blue), var(--purple)); }
.business-card-emoji { font-size: 2.2rem; }
.business-card-cover-tag { padding: 4px 8px; background: rgba(255,255,255,.18); border-radius: 4px; font-size: .78rem; font-weight: 700; }
.business-card-body { padding: 20px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.card-tag { color: var(--blue); background: rgba(20,110,245,.08); border-radius: 4px; padding: 4px 8px; font-size: .82rem; font-weight: 700; }
.card-link { display: inline-flex; color: var(--blue); font-weight: 800; margin-top: 16px; }

/* 优势区 */
.advantage-card { padding: 22px; transition: transform .2s ease, box-shadow .2s ease; }
.advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.advantage-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 8px; color: #fff; background: var(--blue); font-weight: 800; margin-bottom: 16px; }

/* 流程区 */
.process-card { padding: 22px; position: relative; }
.process-num { color: var(--blue); font-weight: 900; font-size: 2rem; line-height: 1; margin-bottom: 12px; }

/* 新闻区 */
.news-list { display: grid; gap: 16px; margin-top: 34px; }
.news-item { overflow: hidden; display: grid; }
.news-image { min-height: 170px; background: linear-gradient(135deg, #eaf2ff, #ecfff6); }
.news-image img { width: 100%; height: 100%; object-fit: cover; }
.news-content { padding: 20px; }
.news-category { color: var(--blue); font-size: .78rem; font-weight: 800; }
.news-content h3 { margin: 6px 0 8px; font-size: 1.18rem; }
.news-summary { color: var(--muted); margin: 0; }
.news-meta { color: #7a8496; display: flex; gap: 14px; margin-top: 12px; font-size: .88rem; }

/* CTA横幅 */
.cta-band { padding: 68px 0; background: linear-gradient(135deg, var(--blue), #0a2f83); color: #fff; }
.cta-box { display: grid; gap: 22px; align-items: center; }
.cta-box h2 { margin: 0; font-size: 2rem; line-height: 1.2; }
.cta-box p { margin: 10px 0 0; color: rgba(255,255,255,.78); }
.cta-box .btn-primary { background: #fff; color: var(--blue); box-shadow: none; }
.cta-box .btn-secondary { background: transparent; color: #fff; border-color: rgba(255,255,255,.38); }

/* 定价区 */
.pricing-section { background: linear-gradient(180deg, #fff 0%, #f5f8fc 100%); }
.pricing-head { display: grid; gap: 20px; align-items: end; }
.saving-card { border: 1px solid rgba(255,122,26,.28); background: #fff7ed; border-radius: 8px; padding: 18px; box-shadow: 0 14px 34px rgba(255,122,26,.08); }
.saving-card strong { display: block; color: #9a3d00; font-size: 1.05rem; margin-bottom: 6px; }
.saving-card span { display: block; color: #7c4a20; line-height: 1.6; }
.pricing-grid { display: grid; gap: 18px; margin-top: 34px; }
.price-card { position: relative; display: flex; flex-direction: column; gap: 14px; min-height: 100%; padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 18px 44px rgba(15,35,75,.07); transition: transform .2s ease, box-shadow .2s ease; }
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.price-card-featured { border-color: rgba(20,110,245,.42); box-shadow: 0 26px 70px rgba(20,110,245,.16); transform: translateY(-6px); }
.price-card-featured:hover { transform: translateY(-10px); }
.price-badge { position: absolute; right: 16px; top: -14px; padding: 6px 10px; border-radius: 4px; color: #fff; background: var(--orange); font-size: .78rem; font-weight: 800; }
.price-top { display: flex; justify-content: space-between; gap: 12px; align-items: center; color: var(--muted); font-size: .86rem; }
.price-top span { color: var(--blue); font-weight: 900; }
.price-top b { color: var(--muted); font-weight: 700; }
.price-card h3 { margin: 0; font-size: 1.45rem; line-height: 1.25; }
.price-line { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.price-line strong { color: var(--blue); font-size: 1.85rem; line-height: 1.12; font-weight: 900; overflow-wrap: anywhere; }
.price-line em { color: var(--orange); font-style: normal; font-weight: 800; }
.price-card p { margin: 0; color: var(--muted); }
.price-card ul { display: grid; gap: 8px; margin: 2px 0 0; padding: 0; list-style: none; }
.price-card li { position: relative; padding-left: 20px; color: #334155; }
.price-card li::before { content: ""; position: absolute; left: 0; top: .7em; width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.price-card .btn { margin-top: auto; }
.deal-strip { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 18px; padding: 16px 18px; border: 1px solid rgba(15,186,115,.24); border-radius: 8px; background: #ecfff6; color: #14543b; }
.deal-strip strong { color: #073d29; }

/* 零风险对比区 */
.compare-grid { display: grid; gap: 18px; margin-top: 34px; }
.compare-card { border: 1px solid var(--line); border-radius: 12px; padding: 28px; background: #fff; position: relative; overflow: hidden; }
.compare-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; }
.compare-traditional::before { background: linear-gradient(90deg, var(--red), var(--orange)); }
.compare-huitang::before { background: linear-gradient(90deg, var(--green), var(--blue)); }
.compare-label { display: inline-block; padding: 4px 12px; border-radius: 4px; font-size: .82rem; font-weight: 800; margin-bottom: 14px; }
.compare-traditional .compare-label { background: rgba(232,64,64,.1); color: var(--red); }
.compare-huitang .compare-label { background: rgba(15,186,115,.1); color: var(--green); }
.compare-card h3 { margin: 0 0 16px; font-size: 1.4rem; }
.compare-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.compare-card li { padding-left: 28px; position: relative; font-size: 1rem; line-height: 1.5; }
.compare-bad::before { content: "✕"; position: absolute; left: 0; color: var(--red); font-weight: 900; }
.compare-good::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 900; }
.compare-huitang { border-color: rgba(15,186,115,.25); box-shadow: 0 18px 44px rgba(15,186,115,.08); }

/* 新闻分类标签 */
.news-page-header { margin-bottom: 24px; }
.category-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.category-tab { padding: 8px 18px; border: 1px solid var(--line); border-radius: 20px; background: #fff; color: var(--muted); font-weight: 600; cursor: pointer; transition: all .2s ease; font-size: .9rem; }
.category-tab:hover { border-color: var(--blue); color: var(--blue); }
.category-tab.active { background: var(--blue); color: #fff; border-color: var(--blue); }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 32px; flex-wrap: wrap; }
.page-btn { min-width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); font-weight: 600; cursor: pointer; transition: all .2s ease; padding: 0 12px; }
.page-btn:hover:not(.disabled):not(.active) { border-color: var(--blue); color: var(--blue); }
.page-btn.active { background: var(--blue); color: #fff; border-color: var(--blue); }
.page-btn.disabled { opacity: .4; cursor: not-allowed; }
.page-ellipsis { display: inline-flex; align-items: center; padding: 0 4px; color: var(--muted); }

/* 新闻详情页 */
.news-detail-article { max-width: 800px; margin: 0 auto; }
.news-detail-header { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.news-detail-header h1 { font-size: 2rem; line-height: 1.3; margin: 12px 0 16px; }
.news-detail-body { color: #344055; line-height: 1.8; font-size: 1.05rem; }
.news-detail-body p { margin: 0 0 18px; }
.news-detail-body h2 { font-size: 1.4rem; margin: 32px 0 14px; color: var(--ink); }
.news-detail-body h3 { font-size: 1.2rem; margin: 24px 0 12px; color: var(--ink); }
.news-detail-body ul, .news-detail-body ol { padding-left: 24px; margin: 0 0 18px; }
.news-detail-body li { margin-bottom: 6px; }
.news-detail-body strong { color: var(--ink); }
.news-detail-body blockquote { border-left: 4px solid var(--blue); padding: 12px 20px; margin: 18px 0; background: var(--soft); border-radius: 0 6px 6px 0; color: var(--muted); }
.news-detail-footer { display: flex; gap: 12px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); flex-wrap: wrap; }

/* 联系区 */
.contact-grid { display: grid; gap: 24px; align-items: start; }
.contact-card { padding: 22px; }
.contact-info { display: grid; gap: 12px; margin-top: 20px; }
.contact-info div { padding: 14px; background: var(--soft); border-radius: 6px; color: var(--muted); }
.contact-info strong { display: block; color: var(--ink); }
.contact-wechat { text-align: center; }
.wechat-qr { width: 140px; height: 140px; margin: 10px auto 0; border-radius: 8px; border: 1px solid var(--line); background: #f0f0f0; display: block; }
.contact-form { display: grid; gap: 14px; }
.form-row { display: grid; gap: 14px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 6px; }
.form-group input, .form-group textarea { width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 12px; outline: none; background: #fff; transition: border-color .2s ease, box-shadow .2s ease; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(20,110,245,.12); }
.form-group.error input, .form-group.error textarea { border-color: var(--red); }
.error-text { display: none; color: var(--red); font-size: .85rem; margin-top: 4px; }
.form-group.error .error-text { display: block; }

/* Toast通知 */
.toast { position: fixed; right: 16px; top: 86px; z-index: 10000; max-width: calc(100vw - 32px); padding: 12px 18px; color: #fff; background: var(--ink); border-radius: 8px; transform: translateX(120%); transition: transform .28s ease; }
.toast.show { transform: translateX(0); }
.toast-success { background: var(--green); }
.toast-error { background: var(--red); }
.toast-warning { background: var(--orange); }

/* 页脚 */
.footer { background: #07101f; color: #dbe6f5; padding: 48px 0 0; }
.footer-grid { display: grid; gap: 26px; }
.footer .site-name, .footer h4 { color: #fff; }
.footer p, .footer a { color: #9fb0c7; }
.footer-links { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 34px; padding: 18px 0; color: #8ea1ba; text-align: center; }
.footer-bottom p { margin: 4px 0; }
.footer-icp { font-size: .85rem; }
.footer-icp a:hover { color: #dbe6f5; text-decoration: underline; }

/* 动画 */
.reveal { opacity: 1; transform: translateY(0); }
.reveal.revealed { opacity: 1; transform: translateY(0); }
.loading { color: var(--muted); padding: 18px; border: 1px dashed var(--line); border-radius: 8px; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* 平板端 */
@media (min-width: 768px) {
  html { font-size: 15px; }
  .container { padding: 0 24px; }
  .hero-grid, .contact-grid, .cta-box { grid-template-columns: 1.1fr .9fr; }
  .pricing-head { grid-template-columns: 1fr 360px; }
  .pain-grid, .advantage-grid, .business-grid, .process-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pricing-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .compare-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .news-item { grid-template-columns: 260px 1fr; }
  .form-row { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; }
  .model-steps { grid-template-columns: 1fr auto 1fr auto 1fr; }
  .model-step-arrow { display: flex; }
}

/* 桌面端 */
@media (min-width: 1024px) {
  html { font-size: 16px; }
  .container { padding: 0 32px; }
  .nav-links { display: flex; }
  .mobile-menu-btn { display: none; }
  .mobile-menu { display: none !important; }
  .hero h1 { font-size: 4.4rem; }
  .section-title { font-size: 3rem; }
  .pain-grid, .advantage-grid, .business-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .process-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* 移动端 */
@media (max-width: 767px) {
  .section { padding: 54px 0; }
  .hero { padding-top: 76px; }
  .hero-proof { grid-template-columns: 1fr; }
  .hero-actions .btn, .cta-box .btn, .contact-form .btn { width: 100%; }
  .banner-slide { padding: 26px 52px 44px 22px; min-height: 280px; }
  .banner-content h2 { font-size: 1.55rem; }
  .banner-btn { width: 44px; height: 44px; }
  .audit-row { grid-template-columns: 76px 1fr; }
  .audit-row strong { grid-column: 1 / -1; }
  .model-step { padding: 22px 18px; }
  .model-step-price { font-size: 1.6rem; }
  .compare-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-head { grid-template-columns: 1fr; }
}