/* ============================================================
   快连官网 - 全站共享样式 v3（重构版设计体系）
   设计语言：深海蓝 + 青蓝渐变，卡片化，模块逻辑重构
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
    --bg: #f6f8fc;
    --card: #ffffff;
    --ink: #14253f;          /* 标题 */
    --slate: #52687f;        /* 正文 */
    --muted: #8ba0b8;        /* 次要 */
    --line: #e4ebf4;         /* 边框 */
    --navy-900: #081a30;     /* 深海军蓝 */
    --navy-800: #0e2947;
    --cyan: #0fb5d6;
    --blue: #2f6bff;
    --grad: linear-gradient(120deg, #0fb5d6 0%, #2f6bff 100%);
    --grad-soft: linear-gradient(120deg, rgba(15,181,214,.10), rgba(47,107,255,.10));
    --green: #0fbf8f;
    --radius: 18px;
    --shadow: 0 10px 30px rgba(14, 41, 71, .08);
    --shadow-lg: 0 18px 48px rgba(14, 41, 71, .12);
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
section { scroll-margin-top: 90px; }

/* ---------- 通用组件 ---------- */
.section { padding: 72px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head .eyebrow {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: .78rem; font-weight: 700; letter-spacing: .12em;
    color: var(--blue); text-transform: uppercase;
    background: var(--grad-soft); border: 1px solid rgba(47,107,255,.18);
    padding: 5px 16px; border-radius: 999px; margin-bottom: 14px;
}
.section-head h2 { font-size: 2rem; font-weight: 800; color: var(--ink); }
.section-head p { color: var(--slate); margin-top: 10px; font-size: 1rem; }

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 999px;
    font-weight: 600; font-size: .95rem; border: none; cursor: pointer;
    transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-grad { background: var(--grad); color: #fff; box-shadow: 0 8px 20px rgba(47,107,255,.28); }
.btn-grad:hover { box-shadow: 0 12px 28px rgba(47,107,255,.38); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.45); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-soft { background: var(--grad-soft); color: var(--blue); border: 1px solid rgba(47,107,255,.2); }

/* ---------- 顶栏 ---------- */
.topbar { background: var(--navy-900); color: rgba(255,255,255,.78); font-size: .8rem; padding: 7px 0; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; }
.topbar .tb-l { display: flex; align-items: center; gap: 8px; }
.topbar .tb-l i { color: var(--cyan); }
.topbar .tb-r a { color: rgba(255,255,255,.78); margin-left: 16px; transition: color .2s; }
.topbar .tb-r a:hover { color: var(--cyan); }

/* ---------- 导航栏 ---------- */
.navbar { background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 100; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.45rem; font-weight: 800; color: var(--navy-900); }
.logo i { color: var(--blue); font-size: 1.5rem; }
.logo span { color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links > a { font-size: .93rem; font-weight: 500; color: var(--slate); position: relative; padding: 6px 0; transition: color .2s; }
.nav-links > a:hover { color: var(--blue); }
.nav-links > a.active { color: var(--blue); }
.nav-links > a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; border-radius: 2px; background: var(--grad); }
.btn-nav { background: var(--grad); color: #fff !important; padding: 9px 22px !important; border-radius: 999px; font-weight: 600 !important; box-shadow: 0 6px 16px rgba(47,107,255,.25); }
.btn-nav:hover { transform: translateY(-1px); }
.burger { display: none; background: none; border: none; font-size: 1.4rem; color: var(--navy-900); cursor: pointer; }

/* ---------- Hero（深色） ---------- */
.hero { background: radial-gradient(900px 420px at 82% -10%, rgba(15,181,214,.28), transparent 60%), radial-gradient(700px 420px at 10% 110%, rgba(47,107,255,.25), transparent 55%), var(--navy-900); color: #fff; padding: 84px 0 88px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(15,181,214,.14); border: 1px solid rgba(15,181,214,.35); color: #7de3f5; font-size: .8rem; font-weight: 600; padding: 6px 18px; border-radius: 999px; margin-bottom: 20px; }
.hero h1 { font-size: 2.85rem; font-weight: 800; line-height: 1.18; margin-bottom: 18px; letter-spacing: .5px; }
.hero h1 .grad-text { background: linear-gradient(100deg, #54e0f7, #7ea6ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { font-size: 1.05rem; color: rgba(255,255,255,.82); max-width: 520px; line-height: 1.9; margin-bottom: 26px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }
.hero-trust { display: flex; gap: 18px; flex-wrap: wrap; font-size: .85rem; color: rgba(255,255,255,.75); }
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust i { color: var(--green); }
.hero-visual { position: relative; }
.hero-visual::before { content: ""; position: absolute; inset: -30px; background: radial-gradient(360px 280px at 50% 50%, rgba(15,181,214,.35), transparent 70%); filter: blur(6px); }
.app-window { position: relative; background: #0d2036; border: 1px solid rgba(255,255,255,.12); border-radius: 20px; padding: 18px; box-shadow: 0 30px 70px rgba(0,0,0,.45); animation: floatY 5s ease-in-out infinite; }
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.app-window img { border-radius: 12px; width: 100%; }

/* ---------- 核心能力（编号行） ---------- */
.feature-rows { display: grid; gap: 18px; }
.feature-row { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 34px; display: grid; grid-template-columns: 92px 1fr auto; gap: 24px; align-items: center; transition: transform .25s, box-shadow .25s; }
.feature-row:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.feature-row .f-num { font-size: 2.6rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }
.feature-row h3 { font-size: 1.18rem; font-weight: 700; margin-bottom: 6px; }
.feature-row p { color: var(--slate); font-size: .95rem; }
.feature-row .f-icon { width: 54px; height: 54px; border-radius: 16px; background: var(--grad-soft); color: var(--blue); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; }

/* ---------- 平台卡片 ---------- */
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.platform-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 22px 26px; text-align: center; position: relative; overflow: hidden; transition: transform .25s, box-shadow .25s; }
.platform-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--grad); opacity: 0; transition: opacity .25s; }
.platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.platform-card:hover::before { opacity: 1; }
.platform-card .p-icon { font-size: 2.5rem; color: var(--blue); display: block; margin-bottom: 10px; }
.platform-card h3 { font-size: 1.12rem; font-weight: 700; }
.platform-card .ver { font-size: .75rem; color: var(--muted); }
.platform-card .desc { font-size: .85rem; color: var(--slate); margin: 8px 0 16px; min-height: 40px; }
.btn-sm { padding: 9px 22px; font-size: .85rem; }

/* ---------- 数据面板（深色带） ---------- */
.stats-band { background: radial-gradient(600px 300px at 20% 0%, rgba(47,107,255,.22), transparent 60%), var(--navy-900); color: #fff; padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats-grid .num { font-size: 2.5rem; font-weight: 800; background: linear-gradient(100deg, #54e0f7, #7ea6ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stats-grid .label { font-size: .88rem; color: rgba(255,255,255,.72); margin-top: 4px; }

/* ---------- 三步流程 ---------- */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; position: relative; }
.step-card .step-no { width: 40px; height: 40px; border-radius: 12px; background: var(--grad); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 1.05rem; margin-bottom: 14px; }
.step-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.step-card p { color: var(--slate); font-size: .92rem; }

/* ---------- 手风琴 FAQ ---------- */
.accordion { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
.acc-item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: border-color .2s; }
.acc-item.open { border-color: rgba(47,107,255,.4); }
.acc-q { width: 100%; background: none; border: none; text-align: left; padding: 18px 22px; font-size: 1rem; font-weight: 600; color: var(--ink); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; font-family: inherit; }
.acc-q i { color: var(--blue); transition: transform .25s; }
.acc-item.open .acc-q i { transform: rotate(180deg); }
.acc-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.acc-a-inner { padding: 0 22px 18px; color: var(--slate); font-size: .93rem; line-height: 1.85; }

/* ---------- 资讯卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.news-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; gap: 10px; transition: transform .25s, box-shadow .25s; }
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.news-card .n-date { font-size: .78rem; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.news-card .n-date i { color: var(--blue); }
.news-card h3 { font-size: 1.05rem; font-weight: 700; line-height: 1.5; }
.news-card p { font-size: .88rem; color: var(--slate); line-height: 1.7; flex: 1; }
.news-card .n-more { font-size: .85rem; color: var(--blue); font-weight: 600; }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--grad); color: #fff; border-radius: 24px; padding: 52px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(400px 200px at 85% 20%, rgba(255,255,255,.25), transparent 60%); }
.cta-band h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 10px; position: relative; }
.cta-band p { opacity: .9; margin-bottom: 24px; position: relative; }
.cta-band .btn { background: #fff; color: var(--blue); position: relative; box-shadow: 0 10px 26px rgba(0,0,0,.18); }
.cta-band .btn:hover { transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-900); color: rgba(255,255,255,.72); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 34px; }
.footer .f-logo { font-size: 1.4rem; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.footer .f-logo i { color: var(--cyan); }
.footer .f-logo span { color: var(--cyan); }
.footer .f-about { font-size: .88rem; line-height: 1.8; max-width: 320px; }
.footer .f-social { display: flex; gap: 10px; margin-top: 16px; }
.footer .f-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; color: #fff; font-size: .9rem; transition: background .2s; }
.footer .f-social a:hover { background: var(--blue); }
.footer h4 { color: #fff; font-size: .98rem; margin-bottom: 16px; }
.footer .f-col li { margin-bottom: 9px; }
.footer .f-col li a { font-size: .88rem; transition: color .2s; }
.footer .f-col li a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.09); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: .8rem; }
.footer-bottom a { color: rgba(255,255,255,.55); }
.footer-bottom a:hover { color: var(--cyan); }

/* ---------- 返回顶部 ---------- */
.back-top { position: fixed; bottom: 28px; right: 28px; width: 46px; height: 46px; border-radius: 50%; border: none; background: var(--grad); color: #fff; font-size: 1.05rem; cursor: pointer; box-shadow: 0 8px 20px rgba(47,107,255,.35); display: none; align-items: center; justify-content: center; z-index: 90; transition: transform .2s; }
.back-top:hover { transform: translateY(-3px); }

/* ---------- 子页 Hero ---------- */
.page-hero { background: radial-gradient(800px 300px at 80% -20%, rgba(15,181,214,.25), transparent 55%), radial-gradient(600px 320px at 8% 120%, rgba(47,107,255,.22), transparent 55%), var(--navy-900); color: #fff; padding: 60px 0 56px; }
.page-hero h1 { font-size: 2.3rem; font-weight: 800; margin-bottom: 12px; }
.page-hero h1 .grad-text { background: linear-gradient(100deg, #54e0f7, #7ea6ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.page-hero p { color: rgba(255,255,255,.8); max-width: 640px; font-size: 1rem; line-height: 1.85; }
.page-hero .crumb { display: inline-flex; align-items: center; gap: 8px; font-size: .8rem; color: rgba(255,255,255,.6); margin-bottom: 14px; }
.page-hero .crumb a:hover { color: var(--cyan); }

/* ---------- 下载页大卡片 ---------- */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.dl-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; text-align: center; position: relative; overflow: hidden; transition: transform .25s, box-shadow .25s; }
.dl-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--grad); }
.dl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.dl-card .p-icon { font-size: 2.7rem; color: var(--blue); display: block; margin-bottom: 10px; }
.dl-card h3 { font-size: 1.2rem; font-weight: 700; }
.dl-card .ver { font-size: .8rem; color: var(--muted); }
.dl-card .desc { font-size: .92rem; color: var(--slate); margin: 10px 0 6px; }
.dl-card .size { font-size: .8rem; color: var(--muted); margin-bottom: 18px; }
.btn-lg { padding: 13px 34px; font-size: .98rem; }

/* ---------- 表格 ---------- */
.spec-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.spec-table th, .spec-table td { padding: 14px 18px; text-align: left; font-size: .92rem; }
.spec-table thead th { background: var(--navy-800); color: #fff; font-weight: 600; }
.spec-table tbody tr { border-top: 1px solid var(--line); }
.spec-table tbody tr:nth-child(even) { background: #f9fbfe; }
.spec-table td:first-child { font-weight: 600; color: var(--ink); white-space: nowrap; }

/* ---------- 时间线 ---------- */
.timeline { max-width: 720px; margin: 0 auto; position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--cyan), var(--blue)); border-radius: 2px; }
.tl-item { position: relative; margin-bottom: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; }
.tl-item::before { content: ""; position: absolute; left: -27px; top: 24px; width: 12px; height: 12px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 4px rgba(47,107,255,.18); }
.tl-item .tl-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.tl-item .tl-ver { background: var(--grad); color: #fff; font-size: .75rem; font-weight: 700; padding: 3px 12px; border-radius: 999px; }
.tl-item .tl-date { font-size: .8rem; color: var(--muted); }
.tl-item p { color: var(--slate); font-size: .9rem; }

/* ---------- 教程步骤 ---------- */
.guide-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 32px; margin-bottom: 20px; }
.guide-card h3 { display: flex; align-items: center; gap: 12px; font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; }
.guide-card h3 i { color: var(--blue); font-size: 1.5rem; }
.guide-list { counter-reset: g; display: grid; gap: 10px; }
.guide-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--slate); font-size: .94rem; line-height: 1.75; }
.guide-list li::before { counter-increment: g; content: counter(g); flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--grad-soft); color: var(--blue); font-weight: 700; font-size: .82rem; display: flex; align-items: center; justify-content: center; margin-top: 2px; }

/* ---------- 关于页 ---------- */
.about-rows { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.about-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; text-align: center; }
.about-card .a-icon { width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 16px; background: var(--grad-soft); color: var(--blue); font-size: 1.5rem; display: flex; align-items: center; justify-content: center; }
.about-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.about-card p { color: var(--slate); font-size: .9rem; line-height: 1.75; }
.milestones { max-width: 720px; margin: 0 auto; }
.mile-item { display: grid; grid-template-columns: 96px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.mile-item:last-child { border-bottom: none; }
.mile-item .m-date { font-weight: 800; color: var(--blue); font-size: .95rem; }
.mile-item .m-text h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.mile-item .m-text p { color: var(--slate); font-size: .9rem; }
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; text-align: center; max-width: 560px; margin: 0 auto; }
.contact-card .c-icon { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 50%; background: var(--grad); color: #fff; font-size: 1.6rem; display: flex; align-items: center; justify-content: center; }
.contact-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p { color: var(--slate); margin-bottom: 20px; }

/* ---------- 状态条（实时更新模块） ---------- */
.status-strip { background: #ffffff; border-bottom: 1px solid var(--line); padding: 10px 0; font-size: .82rem; color: var(--slate); }
.status-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 22px; }
.status-inner span { display: inline-flex; align-items: center; gap: 6px; }
.status-inner .dot-ok { color: var(--green); }
.status-inner .live-clock { font-variant-numeric: tabular-nums; color: var(--ink); font-weight: 600; }
.status-inner .s-ver { color: var(--blue); font-weight: 600; }

/* ---------- 场景区（2 列 prose 块） ---------- */
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.scene-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; transition: transform .25s, box-shadow .25s; }
.scene-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.scene-card h3 { display: flex; align-items: center; gap: 10px; font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.scene-card h3 i { color: var(--blue); }
.scene-card p { color: var(--slate); font-size: .92rem; line-height: 1.85; }

/* ---------- 长文 prose 区 ---------- */
.prose-block { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 36px; }
.prose-block h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.prose-block h3 i { color: var(--blue); }
.prose-block p { color: var(--slate); font-size: .97rem; line-height: 2; margin-bottom: 12px; }
.prose-block p:last-child { margin-bottom: 0; }

/* ---------- 四步流程 ---------- */
.steps-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { max-width: 480px; }
    .platform-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr 1fr; }
    .about-rows { grid-template-columns: 1fr 1fr; }
    .feature-row { grid-template-columns: 70px 1fr; }
    .feature-row .f-icon { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .scene-grid { grid-template-columns: 1fr; }
    .steps-grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .status-inner { justify-content: center; text-align: center; }
    .steps-grid-4 { grid-template-columns: 1fr; }
    .prose-block { padding: 26px 22px; }
}
@media (max-width: 768px) {
    .burger { display: block; }
    .nav-links { display: none; position: absolute; left: 0; right: 0; top: 66px; background: #fff; flex-direction: column; align-items: center; gap: 4px; padding: 14px 0 18px; border-bottom: 1px solid var(--line); box-shadow: 0 20px 40px rgba(14,41,71,.1); }
    .nav-links.open { display: flex; }
    .nav-links > a { padding: 10px 0; width: 100%; text-align: center; }
    .nav-links > a.active::after { display: none; }
    .hero { padding: 56px 0 60px; }
    .hero h1 { font-size: 2.1rem; }
    .hero-trust { gap: 10px; }
    .steps-grid, .platform-grid, .news-grid, .dl-grid, .about-rows { grid-template-columns: 1fr; }
    .feature-row { grid-template-columns: 56px 1fr; padding: 22px 20px; }
    .feature-row .f-num { font-size: 2rem; }
    .section { padding: 52px 0; }
    .cta-band { padding: 36px 24px; }
    .cta-band h2 { font-size: 1.4rem; }
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer .f-about { max-width: 100%; }
    .footer .f-social { justify-content: center; }
    .footer-bottom { justify-content: center; text-align: center; }
    .mile-item { grid-template-columns: 1fr; gap: 4px; }
    .page-hero h1 { font-size: 1.8rem; }
    .topbar .tb-r { display: none; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 1.75rem; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .platform-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid .num { font-size: 1.9rem; }
    .section-head h2 { font-size: 1.55rem; }
    .container { padding: 0 16px; }
}