/* ============================================================
   智慧养老 · 子女端 官网样式
   养老暖色主题 · 响应式 · 现代感
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
    /* 主题色 */
    --orange: #FF6B35;
    --orange-light: #FF8A4C;
    --orange-soft: #FFF1E8;
    --green: #2E9E7E;
    --green-light: #4CB8A4;
    --green-soft: #E8F6F1;
    --blue: #4A7CFF;
    --blue-soft: #E8F0FF;
    --purple: #8B6CE6;
    --purple-soft: #F0EAFB;
    --teal: #1FA9A4;
    --teal-soft: #E2F4F3;
    --yellow: #FFB84D;
    --red: #E8505B;

    /* 中性色 */
    --ink: #2D3142;
    --ink-soft: #5A6072;
    --ink-mute: #8A90A0;
    --line: #ECEEF3;
    --bg: #FFFFFF;
    --bg-soft: #FAF7F4;
    --bg-alt: #F6F8FA;

    /* 效果 */
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 12px rgba(45, 49, 66, 0.06);
    --shadow: 0 8px 30px rgba(45, 49, 66, 0.08);
    --shadow-lg: 0 20px 60px rgba(45, 49, 66, 0.12);
    --shadow-orange: 0 12px 30px rgba(255, 107, 53, 0.28);

    --container: 1180px;
    --nav-h: 68px;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { max-width: 100%; display: block; }
code {
    background: rgba(255,255,255,.18);
    padding: 2px 8px;
    border-radius: 6px;
    font-family: "SF Mono", Consolas, Monaco, monospace;
    font-size: .85em;
}

/* ---------- 容器 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 820px; }

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: all .25s ease;
    white-space: nowrap;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 15px 32px; font-size: 16px; }
.btn-primary { background: linear-gradient(135deg, var(--orange) 0%, var(--orange-light) 100%); color: #fff; box-shadow: var(--shadow-orange); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(255, 107, 53, 0.38); }
.btn-ghost { background: rgba(45,49,66,.06); color: var(--ink); }
.btn-ghost:hover { background: rgba(45,49,66,.12); }
.btn-light { background: #fff; color: var(--orange); box-shadow: var(--shadow); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline-light { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.6); }
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-icon { font-size: 22px; }
.btn-text { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }
.btn-text small { font-size: 11px; opacity: .75; font-weight: 400; }

/* ============================================================
   导航
   ============================================================ */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: var(--nav-h);
    background: rgba(255,255,255,.85);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid rgba(45,49,66,.06);
    transition: box-shadow .25s ease;
}
.navbar.scrolled { box-shadow: 0 2px 20px rgba(45,49,66,.08); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-logo {
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; border-radius: 10px;
    background: linear-gradient(135deg, var(--orange), var(--orange-light));
    color: #fff; font-size: 18px; box-shadow: var(--shadow-orange);
}
.brand-text em { color: var(--orange); font-style: normal; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links > li > a {
    padding: 8px 14px; border-radius: 999px; font-size: 15px; color: var(--ink-soft);
    transition: all .2s ease;
}
.nav-links > li > a:hover { color: var(--orange); background: var(--orange-soft); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero 首屏
   ============================================================ */
.hero {
    position: relative;
    padding: calc(var(--nav-h) + 60px) 0 120px;
    background: linear-gradient(160deg, #FFF6EF 0%, #FFEEE0 40%, #F3FBF8 100%);
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.blob { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5; }
.blob-1 { width: 480px; height: 480px; background: radial-gradient(circle, rgba(255,138,76,.55), transparent 70%); top: -120px; right: -100px; }
.blob-2 { width: 420px; height: 420px; background: radial-gradient(circle, rgba(76,184,164,.45), transparent 70%); bottom: -140px; left: -80px; }
.blob-3 { width: 300px; height: 300px; background: radial-gradient(circle, rgba(255,184,77,.4), transparent 70%); top: 40%; left: 45%; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 50px; align-items: center; }

.badge {
    display: inline-block; padding: 6px 16px; border-radius: 999px;
    background: rgba(255,107,53,.12); color: var(--orange);
    font-size: 13px; font-weight: 600; letter-spacing: .5px; margin-bottom: 22px;
}
.hero-title {
    font-size: clamp(34px, 5vw, 56px); line-height: 1.18; font-weight: 800;
    color: var(--ink); letter-spacing: -.5px;
}
.hero-subtitle { margin-top: 22px; font-size: 18px; color: var(--ink-soft); max-width: 540px; }
.hero-tagline { margin-top: 14px; font-size: 15px; color: var(--green); font-weight: 600; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { margin-top: 44px; display: flex; gap: 38px; }
.hero-stats .stat { display: flex; flex-direction: column; }
.hero-stats .stat strong { font-size: 34px; font-weight: 800; color: var(--orange); line-height: 1; }
.hero-stats .stat span { font-size: 13px; color: var(--ink-mute); margin-top: 6px; }

/* 手机 mockup */
.hero-visual { display: flex; justify-content: center; }
.phone-mock { position: relative; width: 280px; }
.phone-glow {
    position: absolute; inset: -30px; border-radius: 50px;
    background: radial-gradient(circle, rgba(255,138,76,.35), transparent 70%);
    filter: blur(30px); z-index: 0;
}
.phone-screen {
    position: relative; z-index: 1;
    background: #fff; border-radius: 38px; padding: 14px;
    box-shadow: 0 30px 70px rgba(45,49,66,.22), 0 0 0 8px #2D3142, 0 0 0 9px #444a5e;
    transform: rotate(-3deg);
    transition: transform .4s ease;
}
.phone-mock:hover .phone-screen { transform: rotate(0deg); }
.screen-header { display: flex; gap: 6px; padding: 6px 8px 14px; }
.screen-header .dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-red { background: #FF5F57; } .dot-yellow { background: #FEBC2E; } .dot-green { background: #28C840; }
.screen-body { padding: 4px 4px 10px; }
.screen-greet { font-size: 18px; font-weight: 700; margin-bottom: 14px; color: var(--ink); }
.screen-card {
    display: flex; align-items: center; gap: 12px; padding: 12px 14px;
    border-radius: 14px; margin-bottom: 10px; color: #fff;
}
.screen-card strong { display: block; font-size: 14px; }
.screen-card small { font-size: 12px; opacity: .9; }
.screen-card .screen-emoji { font-size: 22px; }
.screen-card--green { background: linear-gradient(135deg, var(--green-light), var(--green)); }
.screen-card--orange { background: linear-gradient(135deg, var(--orange-light), var(--orange)); }
.screen-card--blue { background: linear-gradient(135deg, #6C9BFF, var(--blue)); }
.screen-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.grid-item {
    background: var(--bg-alt); border-radius: 12px; padding: 12px 8px; text-align: center;
    font-size: 24px;
}
.grid-item small { display: block; font-size: 11px; color: var(--ink-soft); margin-top: 4px; }

/* 波浪分隔 */
.wave-divider { position: absolute; bottom: -1px; left: 0; right: 0; line-height: 0; }
.wave-divider svg { width: 100%; height: 80px; }

/* ============================================================
   通用 Section
   ============================================================ */
.section { padding: 100px 0; background: var(--bg); }
.section--alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-tag {
    display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
    color: var(--orange); background: var(--orange-soft); padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.section-tag--light { color: #fff; background: rgba(255,255,255,.2); }
.section-title { font-size: clamp(28px, 3.5vw, 40px); font-weight: 800; color: var(--ink); letter-spacing: -.5px; }
.section-desc { margin-top: 18px; font-size: 17px; color: var(--ink-soft); }

/* ============================================================
   痛点
   ============================================================ */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pain-grid > :nth-child(4),
.pain-grid > :nth-child(5) { grid-column: span 1; }
.pain-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 32px 28px; transition: all .3s ease; position: relative; overflow: hidden;
}
.pain-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--orange), var(--orange-light));
    transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.pain-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.pain-card:hover::before { transform: scaleX(1); }
.pain-icon {
    width: 56px; height: 56px; border-radius: 14px; background: var(--orange-soft);
    display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 18px;
}
.pain-card h3 { font-size: 19px; margin-bottom: 10px; color: var(--ink); }
.pain-card p { color: var(--ink-soft); font-size: 15px; }
.pain-conclusion {
    text-align: center; margin-top: 48px; font-size: 18px; color: var(--ink-soft);
    max-width: 760px; margin-left: auto; margin-right: auto;
}
.pain-conclusion span { color: var(--orange); font-weight: 700; }

/* ============================================================
   价值
   ============================================================ */
.value-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.value-card {
    background: #fff; border-radius: var(--radius); padding: 34px 22px; text-align: center;
    border: 1px solid var(--line); transition: all .3s ease; position: relative;
}
.value-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.value-icon {
    width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 18px;
    display: flex; align-items: center; justify-content: center; font-size: 30px;
    background: color-mix(in srgb, var(--vc) 12%, #fff);
    box-shadow: 0 8px 20px color-mix(in srgb, var(--vc) 25%, transparent);
}
.value-card h3 { font-size: 20px; margin-bottom: 10px; color: var(--vc); }
.value-card p { font-size: 14px; color: var(--ink-soft); }

/* ============================================================
   六大能力
   ============================================================ */
.feature-list { display: flex; flex-direction: column; gap: 60px; }
.feature {
    display: grid; grid-template-columns: 340px 1fr; gap: 50px; align-items: center;
    background: #fff; border-radius: var(--radius-lg); padding: 40px;
    box-shadow: var(--shadow-sm); border: 1px solid var(--line);
    transition: box-shadow .3s ease;
}
.feature:hover { box-shadow: var(--shadow); }
.feature--reverse .feature-visual { order: 2; }
.feature-visual {
    position: relative; aspect-ratio: 4/3; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.feature-visual::after {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,.4), transparent 50%);
}
.feature-emoji { font-size: 92px; position: relative; z-index: 1; filter: drop-shadow(0 8px 16px rgba(0,0,0,.15)); }
.feature-no {
    position: absolute; bottom: 18px; right: 22px; z-index: 1;
    font-size: 60px; font-weight: 900; color: rgba(255,255,255,.35); line-height: 1; letter-spacing: -2px;
}
.feature-visual--red { background: linear-gradient(135deg, #FF8A8F, #E8505B); }
.feature-visual--green { background: linear-gradient(135deg, #4CB8A4, #2E9E7E); }
.feature-visual--blue { background: linear-gradient(135deg, #6C9BFF, #4A7CFF); }
.feature-visual--purple { background: linear-gradient(135deg, #A98CE8, #8B6CE6); }
.feature-visual--orange { background: linear-gradient(135deg, #FFB066, #FF8A4C); }
.feature-visual--teal { background: linear-gradient(135deg, #4FCFC9, #1FA9A4); }

.feature-kicker {
    display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 1.5px;
    color: var(--orange); text-transform: uppercase; margin-bottom: 10px;
}
.feature-title { font-size: 26px; font-weight: 800; color: var(--ink); margin-bottom: 14px; line-height: 1.3; }
.feature-sell { color: var(--ink-soft); font-size: 16px; margin-bottom: 20px; }

.feature-flow { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 20px 0; }
.flow-step {
    flex: 1; min-width: 120px; background: var(--bg-alt); border-radius: 12px; padding: 12px 14px;
    border: 1px solid var(--line);
}
.flow-step strong { display: block; font-size: 14px; color: var(--orange); }
.flow-step small { font-size: 12px; color: var(--ink-mute); }
.flow-arrow { color: var(--orange); font-size: 20px; font-weight: 700; }

.feature-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.feature-tags span {
    background: var(--orange-soft); color: var(--orange); padding: 6px 14px;
    border-radius: 999px; font-size: 13px; font-weight: 600;
}

.feature-list-mini { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; margin: 16px 0; }
.feature-list-mini li { font-size: 14px; color: var(--ink-soft); }

.feature-story {
    margin-top: 20px; padding: 18px 22px; border-left: 4px solid var(--green);
    background: var(--green-soft); border-radius: 0 12px 12px 0;
    font-size: 14px; color: var(--ink-soft); font-style: italic;
}
.feature-story::before { content: "🎬 场景故事　"; font-style: normal; font-weight: 700; color: var(--green); }

.order-status { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 18px 0; }
.status-col { background: var(--bg-alt); border-radius: 12px; padding: 14px; border: 1px solid var(--line); }
.status-col strong { display: block; color: var(--orange); font-size: 15px; margin-bottom: 6px; }
.status-col span { font-size: 12px; color: var(--ink-mute); }

/* ============================================================
   角色
   ============================================================ */
.role-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.role-card {
    background: #fff; border-radius: var(--radius); padding: 32px 24px; text-align: center;
    border: 1px solid var(--line); transition: all .3s ease;
}
.role-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.role-avatar {
    width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--orange-soft), var(--green-soft));
    display: flex; align-items: center; justify-content: center; font-size: 34px;
}
.role-card h3 { font-size: 19px; margin-bottom: 10px; }
.role-profile { font-size: 13px; color: var(--ink-mute); margin-bottom: 14px; min-height: 38px; }
.role-gain { font-size: 14px; color: var(--green); font-weight: 600; padding-top: 14px; border-top: 1px dashed var(--line); }
.roles-note { text-align: center; margin-top: 40px; color: var(--ink-soft); font-size: 15px; }

/* ============================================================
   对比表
   ============================================================ */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--line); }
.compare-table { width: 100%; border-collapse: collapse; background: #fff; min-width: 600px; }
.compare-table thead { background: linear-gradient(135deg, var(--orange), var(--orange-light)); }
.compare-table th { color: #fff; padding: 20px 24px; font-size: 16px; text-align: left; font-weight: 700; }
.compare-table th:first-child { border-top-left-radius: var(--radius); }
.compare-table th:last-child { border-top-right-radius: var(--radius); }
.compare-table td { padding: 18px 24px; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 15px; vertical-align: top; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: var(--bg-soft); }
.compare-table .compare-cat { font-weight: 700; color: var(--ink); background: var(--orange-soft) !important; }

/* ============================================================
   亮点
   ============================================================ */
.highlight-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.highlight-item {
    display: flex; gap: 14px; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); padding: 22px; transition: all .3s ease;
}
.highlight-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.hl-emoji {
    flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
    background: var(--orange-soft); display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.highlight-item strong { display: block; font-size: 16px; margin-bottom: 4px; }
.highlight-item p { font-size: 13px; color: var(--ink-soft); }

/* ============================================================
   常见问题 - 手风琴
   ============================================================ */
.accordion { display: flex; flex-direction: column; gap: 12px; }
.acc-item {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
    transition: box-shadow .25s ease, border-color .25s ease;
}
.acc-item.active { box-shadow: var(--shadow); border-color: var(--orange); }
.acc-head {
    width: 100%; padding: 22px 26px; background: none; border: none; cursor: pointer;
    font-size: 17px; font-weight: 600; color: var(--ink); text-align: left;
    display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.acc-icon {
    flex-shrink: 0; width: 24px; height: 24px; position: relative;
}
.acc-icon::before, .acc-icon::after {
    content: ""; position: absolute; background: var(--orange); border-radius: 2px;
    transition: transform .3s ease;
}
.acc-icon::before { top: 50%; left: 4px; right: 4px; height: 3px; transform: translateY(-50%); }
.acc-icon::after { left: 50%; top: 4px; bottom: 4px; width: 3px; transform: translateX(-50%); }
.acc-item.active .acc-icon::after { transform: translateX(-50%) rotate(90deg); opacity: 0; }
.acc-body { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.acc-body p { padding: 0 26px 24px; color: var(--ink-soft); font-size: 15px; }

/* ============================================================
   下载区
   ============================================================ */
.section--download { background: var(--bg-soft); }
.download-card {
    background: linear-gradient(135deg, #FF6B35 0%, #FF8A4C 50%, #FFB84D 100%);
    border-radius: 32px; padding: 60px; display: grid;
    grid-template-columns: 1.5fr 1fr; gap: 50px; align-items: center;
    box-shadow: 0 30px 80px rgba(255,107,53,.3); position: relative; overflow: hidden;
}
.download-card::before {
    content: ""; position: absolute; top: -80px; right: -80px; width: 280px; height: 280px;
    border-radius: 50%; background: rgba(255,255,255,.12);
}
.download-card::after {
    content: ""; position: absolute; bottom: -100px; left: 20%; width: 200px; height: 200px;
    border-radius: 50%; background: rgba(255,255,255,.08);
}
.download-info { position: relative; z-index: 1; color: #fff; }
.download-title { font-size: clamp(28px, 3.5vw, 40px); font-weight: 800; margin: 16px 0 14px; }
.download-desc { font-size: 17px; opacity: .95; margin-bottom: 24px; max-width: 520px; }
.download-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; margin-bottom: 30px; font-size: 14px; }
.download-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.download-tip { font-size: 13px; opacity: .9; max-width: 540px; }

.download-qr { position: relative; z-index: 1; display: flex; justify-content: center; }
.qr-mock {
    background: #fff; border-radius: 20px; padding: 22px; text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,.2); width: 220px;
}
.qr-svg { width: 100%; height: auto; border-radius: 8px; }
.qr-text { margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--ink); }

/* ============================================================
   Footer
   ============================================================ */
.footer { background: #1F2333; color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer-inner { display: grid; grid-template-columns: 1.3fr 2fr; gap: 50px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand .brand { margin-bottom: 18px; color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; padding: 5px 0; transition: color .2s ease; }
.footer-col a:hover { color: var(--orange-light); }
.footer-bottom { padding-top: 24px; text-align: center; font-size: 13px; color: rgba(255,255,255,.5); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-content { order: 2; }
    .hero-visual { order: 1; }
    .hero-subtitle, .hero-tagline { margin-left: auto; margin-right: auto; }
    .hero-actions, .hero-stats { justify-content: center; }
    .value-grid { grid-template-columns: repeat(3, 1fr); }
    .role-grid { grid-template-columns: repeat(2, 1fr); }
    .highlight-grid { grid-template-columns: repeat(2, 1fr); }
    .feature { grid-template-columns: 1fr; gap: 28px; padding: 28px; }
    .feature--reverse .feature-visual { order: 0; }
    .feature-visual { max-width: 360px; margin: 0 auto; width: 100%; }
    .download-card { grid-template-columns: 1fr; padding: 40px; text-align: center; }
    .download-list { justify-content: center; }
    .download-actions { justify-content: center; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 720px) {
    .section { padding: 70px 0; }
    .nav-links {
        position: fixed; top: var(--nav-h); left: 0; right: 0;
        background: rgba(255,255,255,.98); backdrop-filter: blur(16px);
        flex-direction: column; align-items: stretch; gap: 0; padding: 14px 20px;
        box-shadow: 0 12px 30px rgba(45,49,66,.12);
        transform: translateY(-150%); transition: transform .35s ease; height: auto;
    }
    .nav-links.open { transform: translateY(0); }
    .nav-links > li > a { display: block; padding: 14px 16px; border-radius: 10px; }
    .nav-links > li > a.btn { margin-top: 8px; }
    .nav-toggle { display: flex; }

    .pain-grid { grid-template-columns: 1fr; }
    .value-grid { grid-template-columns: repeat(2, 1fr); }
    .role-grid { grid-template-columns: 1fr; }
    .highlight-grid { grid-template-columns: 1fr; }
    .feature-list-mini { grid-template-columns: 1fr; }
    .order-status { grid-template-columns: 1fr; }
    .download-list { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: 1fr 1fr; gap: 24px; }
    .hero-stats { gap: 24px; }
    .hero-stats .stat strong { font-size: 28px; }
    .download-card { padding: 32px 24px; }
    .feature-flow { flex-direction: column; align-items: stretch; }
    .flow-arrow { transform: rotate(90deg); text-align: center; }
}

@media (max-width: 420px) {
    .value-grid { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: 1fr; }
    .hero-actions .btn, .download-actions .btn { width: 100%; }
}

/* 动画入场 */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 选中文本 */
::selection { background: var(--orange); color: #fff; }