/* ============================================================
   Mica For Everyone 中文站样式 - www.micaforeveryone.cn
   扁平现代专业风格 | 品牌蓝取自 Logo（双蓝方块）
   ============================================================ */

:root {
    --primary: #0078D4;
    --primary-dark: #005A9E;
    --primary-deep: #004578;
    --accent: #0A99D6;
    --primary-bg: #EFF6FC;
    --ink: #1B2A41;
    --ink-2: #3D4F66;
    --ink-3: #5A6B7F;
    --line: #DDE6F0;
    --bg: #FFFFFF;
    --bg-alt: #F6FAFD;
    --ok: #107C10;
    --warn: #B25F00;
    --radius: 10px;
    --radius-lg: 14px;
    --shadow: 0 2px 8px rgba(27, 42, 65, .06);
    --shadow-lg: 0 10px 32px rgba(27, 42, 65, .12);
    --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --mono: "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
    font-family: var(--font);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: saturate(1.4);
}
.header-inner { display: flex; align-items: center; gap: 32px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); }
.brand:hover { text-decoration: none; color: var(--ink); }
.brand svg { flex: none; }
.brand .brand-sub { font-size: 11px; font-weight: 400; color: var(--ink-3); display: block; line-height: 1; margin-top: 2px; }

.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a {
    color: var(--ink-2); font-size: 15px; font-weight: 500;
    padding: 8px 14px; border-radius: 6px;
}
.main-nav a:hover { color: var(--primary); background: var(--primary-bg); text-decoration: none; }
.main-nav a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }

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

.nav-toggle {
    display: none; margin-left: auto;
    background: none; border: 1px solid var(--line); border-radius: 8px;
    width: 42px; height: 42px; cursor: pointer; color: var(--ink);
    align-items: center; justify-content: center;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-family: var(--font); font-size: 15px; font-weight: 600;
    padding: 11px 26px; border-radius: 8px; cursor: pointer;
    border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s;
    line-height: 1.3;
}
.btn:hover { text-decoration: none; }
.btn svg { flex: none; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }

.btn-lg { font-size: 17px; padding: 14px 36px; border-radius: 10px; }

.btn-ghost { background: #fff; color: var(--primary-dark); border-color: var(--primary); }
.btn-ghost:hover { background: var(--primary-bg); color: var(--primary-dark); }

.btn-outline { background: transparent; color: var(--ink-2); border-color: var(--line); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: #fff; }

.btn-sm { font-size: 14px; padding: 8px 18px; }

/* ---------- 首页 Hero ---------- */
.hero { padding: 88px 0 72px; background: linear-gradient(180deg, #F2F8FD 0%, #FFFFFF 100%); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-kicker {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 600; color: var(--primary-dark);
    background: var(--primary-bg); border: 1px solid #CFE4F7;
    padding: 5px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 700; letter-spacing: -.5px; }
.hero h1 .hl { color: var(--primary); }
.hero-sub { font-size: 18px; color: var(--ink-3); margin: 20px 0 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 28px; font-size: 13.5px; color: var(--ink-3); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { color: var(--ok); }

.hero-visual { position: relative; }

/* 窗口示意（Mica 特效模拟） */
.win-mockup {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); overflow: hidden; max-width: 520px; margin-left: auto;
}
.win-titlebar {
    display: flex; align-items: center; gap: 10px; height: 44px; padding: 0 16px;
    background: linear-gradient(135deg, #E8F1FA 0%, #DDEAF6 55%, #E3EDF8 100%);
    border-bottom: 1px solid #CFDEEC;
}
.win-titlebar .t-dot { width: 9px; height: 9px; border-radius: 50%; background: #B7CCDF; }
.win-titlebar .t-dot.live { background: var(--primary); }
.win-titlebar .t-name { font-size: 12.5px; color: var(--ink-2); font-weight: 600; }
.win-titlebar .t-badge {
    margin-left: auto; font-size: 10.5px; font-weight: 700; color: var(--primary-dark);
    background: rgba(0, 120, 212, .12); border-radius: 4px; padding: 2px 8px;
}
.win-body { display: flex; min-height: 320px; }
.win-side { width: 128px; background: var(--bg-alt); border-right: 1px solid var(--line); padding: 18px 14px; }
.win-side .s-item { height: 12px; border-radius: 6px; background: #D9E4EF; margin-bottom: 14px; }
.win-side .s-item.on { background: var(--primary); opacity: .85; }
.win-main { flex: 1; padding: 22px; }
.win-main .m-block { height: 150px; border-radius: 10px; background: linear-gradient(135deg, #F0F7FD, #E1EEF9); border: 1px solid #DCE9F4; margin-bottom: 18px; }
.win-main .m-line { height: 11px; border-radius: 6px; background: #E4EBF3; margin-bottom: 12px; }
.win-main .m-line.w60 { width: 60%; }
.win-main .m-line.w85 { width: 85%; }

.effect-float {
    position: absolute; background: #fff; border: 1px solid var(--line);
    border-radius: 10px; box-shadow: var(--shadow-lg); padding: 12px 16px;
    display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; color: var(--ink-2);
}
.effect-float .sw { width: 22px; height: 22px; border-radius: 6px; }
.effect-float.ef-1 { top: -22px; left: 4%; }
.effect-float.ef-2 { bottom: -20px; right: 2%; }
.ef-1 .sw { background: linear-gradient(135deg, #E6EFF8, #D3E4F2); border: 1px solid #C6DAEB; }
.ef-2 .sw { background: linear-gradient(135deg, rgba(10, 153, 214, .35), rgba(10, 153, 214, .12)); border: 1px solid #B7DCEE; backdrop-filter: blur(3px); }

/* ---------- 数据带 ---------- */
.stats-band { background: var(--primary-deep); color: #fff; padding: 34px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item .num { font-size: 30px; font-weight: 700; line-height: 1.2; }
.stat-item .num small { font-size: 16px; font-weight: 600; }
.stat-item .lab { font-size: 13px; color: #B9D6EE; margin-top: 4px; }

/* ---------- 通用区块 ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 640px; margin: 0 auto 52px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.kicker {
    display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
    color: var(--primary); text-transform: uppercase; margin-bottom: 10px;
}
.section-head h2 { font-size: 32px; font-weight: 700; line-height: 1.35; letter-spacing: -.3px; }
.section-head p { color: var(--ink-3); margin-top: 14px; font-size: 16.5px; }

/* ---------- 卡片 ---------- */
.card-grid { display: grid; gap: 24px; }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 30px 26px; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s, border-color .18s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: #C8DCF0; }
.card .icon-wrap {
    width: 48px; height: 48px; border-radius: 12px; background: var(--primary-bg);
    display: flex; align-items: center; justify-content: center; color: var(--primary); margin-bottom: 18px;
}
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-3); }

/* 场景卡片 */
.scene-card { position: relative; overflow: hidden; }
.scene-card .scene-tag {
    font-size: 11px; font-weight: 700; color: var(--primary-dark);
    background: var(--primary-bg); border-radius: 5px; padding: 3px 9px;
    position: absolute; top: 22px; right: 22px;
}

/* 特效对比 */
.effect-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.effect-panel { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: #fff; box-shadow: var(--shadow); }
.effect-panel .ep-titlebar { height: 46px; display: flex; align-items: center; padding: 0 16px; gap: 8px; border-bottom: 1px solid transparent; }
.effect-panel .ep-titlebar .dots { display: flex; gap: 6px; }
.effect-panel .ep-titlebar .dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(27, 42, 65, .25); }
.effect-panel .ep-titlebar .t { font-size: 12px; font-weight: 600; color: var(--ink-2); }
.ep-mica .ep-titlebar { background: linear-gradient(120deg, #E9F1F9, #DDE9F4 60%, #E6EFF8); border-color: #CFDEEC; }
.ep-acrylic .ep-titlebar {
    background:
        radial-gradient(120px 60px at 20% 40%, rgba(10, 153, 214, .45), transparent 70%),
        radial-gradient(140px 70px at 75% 30%, rgba(0, 120, 212, .35), transparent 70%),
        radial-gradient(100px 60px at 55% 85%, rgba(126, 190, 232, .5), transparent 70%),
        #E8F2FA;
    border-color: #C5DDEC;
}
.ep-body { padding: 22px 20px 26px; }
.ep-body h3 { font-size: 19px; margin-bottom: 8px; }
.ep-body p { font-size: 14.5px; color: var(--ink-3); margin-bottom: 14px; }
.ep-body ul { list-style: none; }
.ep-body li { font-size: 14px; color: var(--ink-2); padding: 5px 0 5px 26px; position: relative; }
.ep-body li::before {
    content: ""; position: absolute; left: 0; top: 11px; width: 15px; height: 15px;
    border-radius: 50%; background: var(--primary-bg);
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230078D4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat, linear-gradient(#fff, #fff);
    -webkit-mask-composite: xor; mask-composite: exclude;
}

/* ---------- 功能行（图标列表） ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; padding: 40px 0; }
.feature-row + .feature-row { border-top: 1px solid var(--line); }
.feature-row .fr-visual {
    background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 34px 30px; min-height: 240px; display: flex; flex-direction: column; justify-content: center; gap: 16px;
}
.fr-text .icon-wrap { margin-bottom: 16px; }
.fr-text h3 { font-size: 23px; font-weight: 700; margin-bottom: 12px; }
.fr-text p { color: var(--ink-3); font-size: 15.5px; }
.fr-text ul { list-style: none; margin-top: 16px; }
.fr-text li { padding: 4px 0 4px 26px; position: relative; font-size: 14.5px; color: var(--ink-2); }
.fr-text li::before {
    content: ""; position: absolute; left: 0; top: 9px; width: 16px; height: 16px; border-radius: 50%;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230078D4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat;
    background: var(--primary);
}

/* 规则模拟可视化 */
.rule-demo { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; }
.rule-demo .rd-head { font-size: 12px; font-weight: 700; color: var(--ink-3); letter-spacing: 1px; margin-bottom: 10px; }
.rule-line { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; font-size: 13.5px; font-family: var(--mono); color: var(--ink-2); }
.rule-line + .rule-line { margin-top: 6px; }
.rule-line .scope { font-size: 11px; font-weight: 700; border-radius: 4px; padding: 2px 8px; flex: none; }
.rule-line.global { background: var(--primary-bg); }
.rule-line.global .scope { background: var(--primary); color: #fff; }
.rule-line.process { background: #F3FAF3; }
.rule-line.process .scope { background: var(--ok); color: #fff; }
.rule-line.class { background: #FFF8EF; }
.rule-line.class .scope { background: var(--warn); color: #fff; }

/* 颜色卡可视化 */
.color-demo { display: flex; gap: 14px; flex-wrap: wrap; }
.color-chip { flex: 1; min-width: 120px; text-align: center; }
.color-chip .chip { height: 64px; border-radius: 10px; border: 1px solid var(--line); margin-bottom: 8px; }
.color-chip .cname { font-size: 12.5px; font-weight: 600; color: var(--ink-2); }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 26px; position: relative; box-shadow: var(--shadow); }
.step .step-no {
    width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff;
    font-weight: 700; font-size: 17px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--ink-3); }
.step p code { background: var(--primary-bg); color: var(--primary-dark); padding: 1px 7px; border-radius: 5px; font-family: var(--mono); font-size: 13px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
thead th {
    text-align: left; background: var(--bg-alt); color: var(--ink-2); font-weight: 700;
    padding: 13px 20px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
tbody td { padding: 13px 20px; border-bottom: 1px solid #EDF2F8; color: var(--ink-2); vertical-align: top; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: #FAFCFE; }
td .ver { font-weight: 700; color: var(--ink); font-family: var(--mono); }
.tag { display: inline-block; font-size: 12px; font-weight: 700; border-radius: 5px; padding: 2px 10px; }
.tag-blue { background: var(--primary-bg); color: var(--primary-dark); }
.tag-green { background: #EAF6EA; color: var(--ok); }
.tag-gray { background: #EEF2F6; color: var(--ink-3); }
.mono { font-family: var(--mono); font-size: 13px; word-break: break-all; }

/* ---------- 下载区 ---------- */
.dl-hero {
    background: linear-gradient(135deg, var(--primary-deep) 0%, #005389 55%, #006AB8 100%);
    color: #fff; padding: 72px 0;
}
.dl-hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 14px; }
.dl-hero p { color: #C6DDF1; font-size: 16.5px; max-width: 640px; }
.dl-hero .btn-white { background: #fff; color: var(--primary-dark); }
.dl-hero .btn-white:hover { background: #EAF4FC; color: var(--primary-deep); }
.dl-hero .btn-line { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .55); }
.dl-hero .btn-line:hover { background: rgba(255, 255, 255, .12); color: #fff; border-color: #fff; }
.dl-meta { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 26px; font-size: 13.5px; color: #B9D6EE; }
.dl-meta b { color: #fff; font-weight: 600; }

.dl-card { display: flex; gap: 26px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.dl-note { font-size: 13px; color: var(--ink-3); margin-top: 14px; }

/* 校验值 */
.hash-box { background: var(--bg-alt); border: 1px dashed #C4D5E5; border-radius: 10px; padding: 14px 18px; font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); word-break: break-all; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
    list-style: none; cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 15.5px;
    display: flex; align-items: center; justify-content: space-between; gap: 14px; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { flex: none; color: var(--ink-3); transition: transform .2s; }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item[open] summary { border-bottom: 1px solid #EDF2F8; color: var(--primary-dark); }
.faq-item .faq-body { padding: 16px 22px 20px; font-size: 14.5px; color: var(--ink-3); }
.faq-body code { background: var(--primary-bg); color: var(--primary-dark); padding: 1px 7px; border-radius: 5px; font-family: var(--mono); font-size: 13px; }
.faq-body a { word-break: break-all; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
    background: linear-gradient(135deg, var(--primary-deep), #006AB8); color: #fff;
    border-radius: var(--radius-lg); padding: 56px 48px; text-align: center;
}
.cta-band h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
.cta-band p { color: #C6DDF1; margin-bottom: 28px; font-size: 16px; }

/* ---------- 关于页 ---------- */
.about-lead { font-size: 17px; color: var(--ink-2); max-width: 760px; }
.timeline { max-width: 760px; }
.timeline .tl-item { display: flex; gap: 20px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.timeline .tl-item:last-child { border-bottom: none; }
.timeline .tl-date { flex: none; width: 110px; font-weight: 700; color: var(--primary-dark); font-size: 14.5px; font-family: var(--mono); }
.timeline .tl-body { font-size: 15px; color: var(--ink-2); }

/* ---------- 页脚 ---------- */
.site-footer { background: #14213A; color: #A9B8CC; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding: 56px 0 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 17px; margin-bottom: 16px; }
.footer-desc { font-size: 13.5px; line-height: 1.8; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 14.5px; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; color: #A9B8CC; font-size: 13.5px; padding: 4px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 20px 0; font-size: 12.5px; color: #7D8DA3; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- 下载弹窗 ---------- */
.modal-overlay {
    position: fixed; inset: 0; z-index: 1000; background: rgba(16, 27, 45, .55);
    display: none; align-items: center; justify-content: center; padding: 24px;
    opacity: 0; transition: opacity .2s;
}
.modal-overlay.show { display: flex; opacity: 1; }
.modal {
    background: #fff; border-radius: 16px; width: 100%; max-width: 640px;
    box-shadow: 0 24px 64px rgba(10, 20, 38, .3); overflow: hidden;
    transform: translateY(12px); transition: transform .2s;
}
.modal-overlay.show .modal { transform: translateY(0); }
.modal-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 26px; border-bottom: 1px solid var(--line);
}
.modal-head h3 { font-size: 18px; font-weight: 700; }
.modal-head h3 small { display: block; font-size: 12.5px; color: var(--ink-3); font-weight: 400; margin-top: 2px; }
.modal-close {
    background: none; border: none; cursor: pointer; color: var(--ink-3);
    width: 34px; height: 34px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--bg-alt); color: var(--ink); }
.modal-body { padding: 26px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.qr-card {
    border: 1px solid var(--line); border-radius: 12px; padding: 22px 16px 18px; text-align: center;
    background: var(--bg-alt); transition: border-color .15s;
}
.qr-card:hover { border-color: var(--primary); }
.qr-card img { width: 172px; height: 172px; margin: 0 auto 12px; border-radius: 8px; border: 1px solid var(--line); background: #fff; padding: 8px; }
.qr-card .qr-name { font-size: 15px; font-weight: 700; color: var(--ink); }
.qr-card .qr-desc { font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }
.modal-tip {
    margin-top: 20px; font-size: 12.5px; color: var(--ink-3); text-align: center;
    background: var(--bg-alt); border-radius: 8px; padding: 10px 14px;
}

/* ---------- 面包屑 ---------- */
.crumbs { font-size: 13px; color: var(--ink-3); padding: 18px 0 0; }
.crumbs a { color: var(--ink-3); }
.crumbs a:hover { color: var(--primary); }

/* ---------- 通用页面头 ---------- */
.page-head { padding: 56px 0 8px; }
.page-head h1 { font-size: 34px; font-weight: 700; letter-spacing: -.3px; }
.page-head .page-sub { color: var(--ink-3); margin-top: 12px; font-size: 16.5px; max-width: 680px; }

/* ---------- 提示框 ---------- */
.note-box {
    display: flex; gap: 12px; background: var(--primary-bg); border: 1px solid #CFE4F7;
    border-radius: 10px; padding: 14px 18px; font-size: 13.5px; color: var(--ink-2); margin-top: 18px;
}
.note-box svg { flex: none; color: var(--primary); margin-top: 2px; }
.note-box.warn { background: #FFF8EF; border-color: #F0DDBB; }
.note-box.warn svg { color: var(--warn); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 44px; }
    .hero h1 { font-size: 34px; }
    .win-mockup { margin: 0 auto; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
    .card-grid.cols-3, .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
    .feature-row { grid-template-columns: 1fr; gap: 24px; }
    .steps { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .effect-compare { grid-template-columns: 1fr; }
    .nav-toggle { display: flex; }
    .main-nav {
        display: none; position: absolute; top: 64px; left: 0; right: 0;
        background: #fff; border-bottom: 1px solid var(--line); flex-direction: column;
        padding: 12px 24px 18px; gap: 2px; box-shadow: var(--shadow-lg);
    }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 10px; }
    .header-cta .btn { display: none; }
    .header-cta .btn.btn-mobile-show { display: inline-flex; }
}

@media (max-width: 640px) {
    .hero { padding: 56px 0 52px; }
    .hero h1 { font-size: 30px; }
    .section { padding: 56px 0; }
    .section-head h2 { font-size: 26px; }
    .card-grid.cols-3, .card-grid.cols-4, .card-grid.cols-2 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .qr-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .cta-band { padding: 40px 26px; }
    .effect-float { display: none; }
    .dl-hero h1 { font-size: 28px; }
    .page-head h1 { font-size: 27px; }
}

/* 无障碍：跳转链接 */
.skip-link {
    position: absolute; left: -9999px; top: 0; z-index: 2000;
    background: var(--primary); color: #fff; padding: 10px 18px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }