/* 官网样式：配色与 KK 自动化装机工具界面一致（品牌蓝 + 白色卡片），支持深色模式 */
:root {
    color-scheme: light;
    --bg: #f5f8fd;
    --bg-2: #eef3fb;
    --surface: #ffffff;
    --surface-2: #f3f6fb;
    --ink: #0e1a2b;
    --text: #2a3a52;
    --muted: #62718a;
    --faint: #93a0b4;
    --line: #e1e8f2;
    --line-strong: #cfd9e7;
    --primary: #1668f0;
    --primary-600: #0f55cc;
    --primary-50: #eaf2ff;
    --primary-100: #d7e6ff;
    --cyan: #a8eefd;
    --green: #17a34a;
    --green-50: #e8f7ee;
    --amber: #c77800;
    --amber-50: #fff5e0;
    --red: #e5484d;
    --purple: #7248de;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 2px rgba(14, 26, 43, .05), 0 1px 1px rgba(14, 26, 43, .03);
    --shadow: 0 24px 60px -24px rgba(22, 60, 130, .28), 0 8px 20px -12px rgba(14, 26, 43, .12);
    --shadow-lg: 0 40px 90px -30px rgba(22, 60, 130, .38);
    --header-bg: rgba(255, 255, 255, .82);
    --footer-bg: #0b1424;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}
:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0a1120;
    --bg-2: #0d1628;
    --surface: #111b2e;
    --surface-2: #16223a;
    --ink: #eef3fb;
    --text: #d3dcea;
    --muted: #94a3ba;
    --faint: #6e7d95;
    --line: #22314b;
    --line-strong: #2d3f5e;
    --primary: #4d8dff;
    --primary-600: #3a7af0;
    --primary-50: rgba(77, 141, 255, .12);
    --primary-100: rgba(77, 141, 255, .22);
    --green-50: rgba(23, 163, 74, .16);
    --amber-50: rgba(199, 120, 0, .18);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow: 0 24px 60px -24px rgba(0, 0, 0, .6);
    --shadow-lg: 0 40px 90px -30px rgba(0, 0, 0, .7);
    --header-bg: rgba(10, 17, 32, .82);
    --footer-bg: #070d18;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body.site-body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; vertical-align: middle; border: 0; }
a { color: var(--primary); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--primary-600); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.3; margin: 0; font-weight: 700; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
button, input, textarea, select { font: inherit; color: inherit; }
code { font-family: var(--mono); }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: 12px; border: 1px solid transparent; font-size: 15px; font-weight: 600; line-height: 1; cursor: pointer; white-space: nowrap; transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease, color .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 10px 24px -10px rgba(22, 104, 240, .7); }
.btn-primary:hover { background: var(--primary-600); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-soft { background: var(--primary-50); color: var(--primary); }
.btn-soft:hover { background: var(--primary-100); color: var(--primary); }
.btn-lg { height: 52px; padding: 0 26px; font-size: 16px; border-radius: 14px; }
.btn-sm { height: 34px; padding: 0 14px; font-size: 13px; border-radius: 9px; }
.btn[disabled], .btn.is-disabled { opacity: .55; pointer-events: none; }
.btn .badge-version { font-size: 12px; font-weight: 600; padding: 3px 7px; border-radius: 6px; background: rgba(255, 255, 255, .2); }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: 14px; }
.link-arrow i { transition: transform .15s ease; }
.link-arrow:hover i { transform: translateX(3px); }

/* ---------- 顶部导航 ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--header-bg); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; height: 68px; gap: 14px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 17px; flex-shrink: 0; }
.brand:hover { color: var(--ink); }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.site-menu { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.site-menu a { display: block; padding: 8px 12px; border-radius: 9px; color: var(--muted); font-size: 14px; font-weight: 500; white-space: nowrap; }
.site-menu a:hover { color: var(--ink); background: var(--surface-2); }
.site-menu a.active { color: var(--primary); background: var(--primary-50); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--muted); cursor: pointer; }
.icon-btn:hover { color: var(--primary); border-color: var(--primary-100); }
.theme-icon-dark { display: none; }
:root[data-theme="dark"] .theme-icon-dark { display: inline; }
:root[data-theme="dark"] .theme-icon-light { display: none; }
.menu-toggle { display: none; }

/* ---------- 首屏 ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 120px; background:
    radial-gradient(900px 480px at 85% 0%, rgba(22, 104, 240, .14), transparent 60%),
    radial-gradient(700px 420px at 0% 30%, rgba(168, 238, 253, .35), transparent 60%),
    var(--bg); }
:root[data-theme="dark"] .hero { background: radial-gradient(900px 480px at 85% 0%, rgba(77, 141, 255, .18), transparent 60%), radial-gradient(700px 420px at 0% 30%, rgba(80, 180, 220, .1), transparent 60%), var(--bg); }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 48px 48px; opacity: .35; mask-image: linear-gradient(180deg, #000 0%, transparent 75%); -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 75%); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 56px; align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px 6px 8px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--primary); font-size: 12px; font-weight: 700; letter-spacing: .08em; box-shadow: var(--shadow-sm); }
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-50); }
.hero h1 { margin: 22px 0 18px; font-size: clamp(38px, 4.6vw, 58px); line-height: 1.12; letter-spacing: -.02em; font-weight: 800; }
.hero h1 .highlight { display: block; background: linear-gradient(90deg, var(--primary), #3aa0ff 60%, #58c7f2); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-lead { font-size: 17px; line-height: 1.85; color: var(--muted); max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; list-style: none; color: var(--text); font-size: 14px; }
.hero-points li { display: flex; align-items: center; gap: 7px; }
.hero-points i { color: var(--green); }
.hero-visual { position: relative; }
.app-window { position: relative; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-lg); overflow: hidden; }
.app-window img { display: block; width: 100%; height: auto; }
.app-window.is-small { position: absolute; width: 50%; left: -8%; bottom: -14%; border-radius: 12px; box-shadow: var(--shadow); border: 4px solid var(--surface); }
.float-chip { position: absolute; right: -14px; top: 14%; display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); font-size: 13px; color: var(--text); }
.float-chip i { width: 30px; height: 30px; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; background: var(--green-50); color: var(--green); }
.float-chip strong { display: block; color: var(--ink); font-size: 13px; }
.float-chip small { color: var(--muted); font-size: 12px; }

/* ---------- 数据条 ---------- */
.stats { position: relative; margin-top: -64px; z-index: 2; }
.stats-card { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--surface); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.stat { padding: 24px 26px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat strong { display: block; font-size: 24px; color: var(--ink); font-weight: 800; letter-spacing: -.01em; }
.stat span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; line-height: 1.5; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.section-head.center { flex-direction: column; align-items: center; text-align: center; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; color: var(--primary); letter-spacing: .06em; margin-bottom: 10px; }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); letter-spacing: -.01em; font-weight: 800; }
.section-head p { margin-top: 12px; color: var(--muted); max-width: 620px; font-size: 16px; }
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--surface-2); color: var(--muted); border: 1px solid var(--line); }
.pill-blue { background: var(--primary-50); color: var(--primary); border-color: transparent; }
.pill-green { background: var(--green-50); color: var(--green); border-color: transparent; }
.pill-amber { background: var(--amber-50); color: var(--amber); border-color: transparent; }
/* 云盘类型徽标：底色为品牌色的浅色调，深浅色主题通用 */
.pill-disk { border-color: transparent; }
.pill-disk-aliyun { background: rgba(59,123,246,.14); color: #3b7bf6; border-color: transparent; }
.pill-disk-quark { background: rgba(124,92,255,.14); color: #7c5cff; border-color: transparent; }
.pill-disk-baidu { background: rgba(43,83,232,.14); color: #2b53e8; border-color: transparent; }
.pill-disk-lanzou { background: rgba(16,158,142,.16); color: #109e8e; border-color: transparent; }
.pill-disk-uc { background: rgba(255,106,61,.16); color: #ff6a3d; border-color: transparent; }
.pill-disk-xunlei { background: rgba(26,155,255,.14); color: #1a9bff; border-color: transparent; }
.pill-disk-tianyi { background: rgba(229,72,77,.14); color: #e5484d; border-color: transparent; }
.pill-disk-123 { background: rgba(99,102,241,.14); color: #6366f1; border-color: transparent; }
.pill-disk-115 { background: rgba(23,163,74,.14); color: #17a34a; border-color: transparent; }
.pill-disk-weiyun { background: rgba(14,165,196,.16); color: #0ea5c4; border-color: transparent; }
.pill-disk-caiyun { background: rgba(47,123,240,.14); color: #2f7bf0; border-color: transparent; }
.pill-disk-onedrive { background: rgba(10,132,216,.14); color: #0a84d8; border-color: transparent; }
.pill-disk-github { background: rgba(110,118,129,.18); color: #6e7681; border-color: transparent; }
.pill-disk-magnet { background: rgba(168,85,247,.15); color: #a855f7; border-color: transparent; }
.pill-disk-other { background: var(--surface-2); color: var(--muted); border: 1px solid var(--line); }
/* 徽标出现在蓝色主按钮里时改成半透明白，避免品牌色与按钮撞色 */
.btn-primary .pill-disk { background: rgba(255,255,255,.22); color: #fff; border-color: transparent; margin-left: 6px; }
/* 下载须知（详情页免责提示） */
.download-note { display: flex; gap: 12px; align-items: flex-start; padding: 16px 18px; background: var(--amber-50); border-color: transparent; }
.download-note > i { color: var(--amber); font-size: 18px; line-height: 1.7; flex: 0 0 auto; }
.download-note .download-note-text { font-size: 13.5px; line-height: 1.75; color: var(--text); }
.download-note .download-note-text a { color: var(--primary); }
/* 下载确认弹窗 */
.dl-modal { position: fixed; inset: 0; z-index: 9999; display: none; align-items: center; justify-content: center; background: rgba(10,18,30,.5); padding: 20px; }
.dl-modal.open { display: flex; }
.dl-modal-card { background: var(--surface); color: var(--text); border-radius: 16px; max-width: 460px; width: 100%; padding: 24px; box-shadow: 0 24px 60px rgba(0,0,0,.32); }
.dl-modal-card h3 { margin: 0 0 14px; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.dl-modal-card h3 i { color: var(--amber); }
.dl-modal-note { font-size: 13.5px; line-height: 1.75; color: var(--text); background: var(--amber-50); border-radius: 10px; padding: 14px 16px; }
.dl-modal-note a { color: var(--primary); }
.dl-modal-agree { display: flex; align-items: flex-start; gap: 8px; margin: 16px 0 20px; font-size: 14px; line-height: 1.6; cursor: pointer; }
.dl-modal-agree input { margin-top: 3px; flex: 0 0 auto; }
.dl-modal-agree a { color: var(--primary); }
.dl-modal-actions { display: flex; gap: 10px; justify-content: flex-end; }
.dl-modal-actions .btn { min-width: 100px; }
.dl-modal-actions .dl-ok[disabled] { opacity: .5; cursor: not-allowed; }
/* 账号体系：登录/注册/个人中心 */
.auth-card { max-width: 440px; margin: 40px auto; }
.auth-title { font-size: 24px; margin: 0 0 6px; }
.auth-sub { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.auth-alt { text-align: center; font-size: 14px; color: var(--muted); margin-top: 16px; }
.auth-alt a { color: var(--primary); }
.auth-msg { min-height: 20px; font-size: 13.5px; color: var(--red); margin: 10px 0 0; text-align: center; }
.code-row { display: flex; gap: 10px; }
.code-row .input { flex: 1; }
.code-row .btn { flex: 0 0 auto; white-space: nowrap; }
.bind-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 6px; }
.bind-row .input { flex: 1; min-width: 200px; }
.user-chip { display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px 4px 5px; border-radius: 999px; background: var(--surface-2); color: var(--text); font-size: 14px; font-weight: 600; border: 1px solid var(--line); text-decoration: none; }
.user-chip img { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; }
.user-chip > i { font-size: 22px; color: var(--muted); }
.user-chip span { max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.profile-avatar { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.profile-avatar img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; border: 1px solid var(--line); }
.cards-table { margin-top: 14px; }
.cards-table code { font-size: 12px; }
.cards-table td, .dl-table td { font-size: 13px; }
.dl-table th, .cards-table th { font-size: 12px; color: var(--muted); font-weight: 600; }
/* 个人中心：我的软件 */
#software { scroll-margin-top: 90px; }
.soft-intro { color: var(--muted); font-size: 13.5px; line-height: 1.75; margin: -6px 0 16px; }
.soft-warn { font-size: 13.5px; line-height: 1.7; color: var(--amber); background: var(--amber-50); border-radius: 10px; padding: 10px 14px; margin: 0 0 16px; }
.soft-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 14px; }
.soft-grid .soft-wide { grid-column: 1 / -1; }
.soft-form .form-row { margin-bottom: 12px; }
.soft-form .form-row label small { font-weight: 400; font-size: 12.5px; color: var(--muted); margin-left: 6px; }
.soft-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.soft-actions [hidden] { display: none; }
.soft-count { margin-left: auto; font-size: 12.5px; color: var(--muted); }
.soft-msg { text-align: left; }
/* width:0 + min-width:100% 让宽表格只在自身内横向滚动，不把单列布局的手机页面撑宽 */
.soft-wrap { width: 0; min-width: 100%; margin-top: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.spec.soft-table { min-width: 680px; }
.spec.soft-table th { width: auto; font-size: 12px; color: var(--muted); font-weight: 600; }
.spec.soft-table th:nth-child(1) { width: 20%; }
.spec.soft-table th:nth-child(2) { width: 29%; }
.spec.soft-table th:nth-child(3) { width: 15%; }
.spec.soft-table th:nth-child(4) { width: 9%; }
.spec.soft-table th:nth-child(5) { width: 11%; }
.spec.soft-table th, .spec.soft-table td { padding-right: 12px; }
.spec.soft-table th:last-child, .spec.soft-table td:last-child { padding-right: 0; }
.spec.soft-table td { font-size: 13px; }
.spec.soft-table td strong { display: block; color: var(--ink); font-weight: 600; }
.soft-note, .soft-err { display: block; margin-top: 3px; font-size: 12px; line-height: 1.5; color: var(--muted); }
.soft-err { color: var(--red); }
.soft-url { font-family: var(--mono); font-size: 12px; }
.soft-muted { color: var(--faint); }
.soft-size, .soft-state .pill { white-space: nowrap; }
.spec.soft-table td.soft-ops { white-space: nowrap; text-align: right; }
.soft-ops .btn { height: 30px; padding: 0 10px; }
.soft-ops .btn + .btn { margin-left: 4px; }
.soft-empty { color: var(--muted); font-size: 14px; margin: 12px 0 0; }
.pill-red { background: rgba(229, 72, 77, .12); color: var(--red); border-color: transparent; }
@media (max-width: 600px) { .soft-grid { grid-template-columns: 1fr; } .soft-count { margin-left: 0; flex-basis: 100%; } }
/* 微信扫码登录 */
.auth-tabs { display: flex; gap: 6px; padding: 4px; margin-bottom: 18px; background: var(--surface-2); border-radius: 12px; }
.auth-tab { flex: 1; border: 0; background: transparent; padding: 9px 10px; border-radius: 9px; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; }
.auth-tab.active { background: var(--surface); color: var(--primary); box-shadow: var(--shadow-sm); }
.auth-tab .fa-weixin { color: #07c160; }
.wx-login { text-align: center; }
.wx-qr { position: relative; width: 200px; height: 200px; margin: 4px auto 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.wx-qr img { width: 188px; height: 188px; }
.wx-qr.is-expired::after { content: '已过期'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(255,255,255,.88); color: #555; font-weight: 700; }
.wx-code { font-size: 40px; font-weight: 800; letter-spacing: 6px; color: #07c160; font-variant-numeric: tabular-nums; }
.wx-code-inline { font-size: 30px; text-align: center; margin: 0 0 6px; }
.wx-loading { font-size: 13px; color: #999; }
.wx-tip { font-size: 13.5px; color: var(--text); line-height: 1.7; margin: 0 0 10px; min-height: 22px; }

/* ---------- 装机流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; list-style: none; }
.step { position: relative; padding: 24px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.step:not(:last-child)::after { content: ""; position: absolute; top: 44px; right: -17px; width: 18px; height: 2px; background: var(--line-strong); }
.step-num { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.step-num b { width: 40px; height: 40px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; background: var(--primary-50); color: var(--primary); font-size: 17px; }
.step:first-child .step-num b { background: var(--primary); color: #fff; }
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 13.5px; line-height: 1.7; }

/* ---------- 功能介绍（标签页） ---------- */
.showcase { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 36px; align-items: start; }
.showcase-tabs { display: flex; flex-direction: column; gap: 6px; }
.showcase-tab { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; padding: 12px 14px; border-radius: 12px; border: 1px solid transparent; background: transparent; cursor: pointer; color: var(--muted); transition: background-color .15s ease, border-color .15s ease; }
.showcase-tab i { width: 36px; height: 36px; flex-shrink: 0; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; background: var(--surface-2); color: var(--muted); font-size: 16px; }
.showcase-tab span { display: flex; flex-direction: column; min-width: 0; }
.showcase-tab strong { color: var(--ink); font-size: 15px; }
.showcase-tab small { font-size: 12.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.showcase-tab:hover { background: var(--surface); border-color: var(--line); }
.showcase-tab.active { background: var(--surface); border-color: var(--primary-100); box-shadow: var(--shadow-sm); }
.showcase-tab.active i { background: var(--primary); color: #fff; }
.showcase-panel { display: none; }
.showcase-panel.active { display: block; animation: fade-up .35s ease; }
.showcase-panel .app-window { margin-bottom: 26px; }
.showcase-panel h3 { font-size: 24px; margin-bottom: 14px; }
.point-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; }
.point-list li { position: relative; padding-left: 26px; color: var(--text); font-size: 14.5px; line-height: 1.7; }
.point-list li::before { content: "\f00c"; font-family: FontAwesome; position: absolute; left: 0; top: 1px; width: 18px; height: 18px; border-radius: 50%; background: var(--green-50); color: var(--green); font-size: 10px; display: flex; align-items: center; justify-content: center; }
.point-list li b { color: var(--ink); }
@keyframes fade-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- 卡片网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.card { position: relative; display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
a.card, .card-hover { color: inherit; }
a.card:hover, .card-hover:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--primary-100); color: inherit; }
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 16px; }
.card-cover { position: relative; aspect-ratio: 16 / 10; background: var(--surface-2); border-bottom: 1px solid var(--line); overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; object-position: top left; transition: transform .4s ease; }
a.card:hover .card-cover img { transform: scale(1.03); }
.card-cover .placeholder, .cover-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 42px; color: var(--primary); background: linear-gradient(135deg, var(--primary-50), var(--surface-2)); }

/* 系统镜像卡片 */
.image-card .card-body { padding: 22px; }
.os-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.os-logo { width: 48px; height: 48px; flex-shrink: 0; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; font-size: 22px; color: #fff; background: linear-gradient(135deg, #1668f0, #3aa0ff); }
.os-logo.is-win10 { background: linear-gradient(135deg, #0a5fb4, #2b8ad8); }
.os-logo.is-server { background: linear-gradient(135deg, #37465f, #5a6b86); }
.os-logo.is-pe { background: linear-gradient(135deg, #7248de, #9b7bf0); }
.os-logo.is-other { background: linear-gradient(135deg, #0f766e, #22a39a); }
.os-logo img { width: 100%; height: 100%; object-fit: cover; border-radius: 12px; }
.os-head h3 { font-size: 16.5px; margin: 0 0 2px; }
.os-head small { color: var(--muted); font-size: 12.5px; }
.image-card .in-tool { position: absolute; top: 16px; right: 16px; }

/* 服务卡片 */
.service-card .card-body { padding: 24px; }
.service-icon { width: 46px; height: 46px; border-radius: 13px; display: inline-flex; align-items: center; justify-content: center; font-size: 20px; background: var(--primary-50); color: var(--primary); margin-bottom: 16px; }
.service-card .price { margin-top: auto; padding-top: 16px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--muted); }

/* 常见问题 */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow-sm); }
.faq-item summary { list-style: none; cursor: pointer; padding: 18px 50px 18px 20px; position: relative; font-weight: 600; color: var(--ink); font-size: 15.5px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "\f067"; font-family: FontAwesome; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); width: 24px; height: 24px; border-radius: 8px; display: flex; align-items: center; justify-content: center; background: var(--surface-2); color: var(--muted); font-size: 11px; transition: transform .2s ease; }
.faq-item[open] summary::after { content: "\f068"; background: var(--primary-50); color: var(--primary); }
.faq-item .faq-answer { padding: 0 20px 18px; color: var(--muted); font-size: 14.5px; line-height: 1.8; }
.faq-item .faq-answer a { font-weight: 600; }

/* 号召条 */
.cta { position: relative; overflow: hidden; border-radius: 24px; padding: 56px; background: linear-gradient(120deg, #0f55cc, #1668f0 45%, #3aa0ff); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 32px; box-shadow: var(--shadow-lg); }
.cta::after { content: ""; position: absolute; right: -80px; top: -120px; width: 360px; height: 360px; border-radius: 50%; background: rgba(255, 255, 255, .1); }
.cta h2 { color: #fff; font-size: clamp(24px, 2.8vw, 32px); font-weight: 800; }
.cta p { margin-top: 10px; color: rgba(255, 255, 255, .85); max-width: 560px; }
.cta .btn-white { background: #fff; color: var(--primary-600); position: relative; z-index: 1; }
.cta .btn-white:hover { color: var(--primary-600); box-shadow: 0 14px 30px -12px rgba(0, 0, 0, .35); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; position: relative; z-index: 1; }
.cta .btn-outline-white { color: #fff; border-color: rgba(255, 255, 255, .5); background: transparent; }
.cta .btn-outline-white:hover { background: rgba(255, 255, 255, .12); color: #fff; }

/* ---------- 内页 ---------- */
.page-hero { padding: 56px 0 44px; background: radial-gradient(700px 300px at 90% 0%, rgba(22, 104, 240, .1), transparent 60%), var(--bg); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(30px, 3.6vw, 42px); font-weight: 800; letter-spacing: -.01em; }
.page-hero p { margin-top: 12px; color: var(--muted); font-size: 16px; max-width: 680px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; color: var(--faint); font-size: 13px; margin-bottom: 14px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.page-body { padding: 44px 0 96px; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 26px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 14px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); font-size: 14px; font-weight: 500; }
.chip:hover { color: var(--ink); border-color: var(--line-strong); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.chip .count { font-size: 12px; opacity: .75; }
.search { display: flex; align-items: center; width: 300px; max-width: 100%; height: 40px; border-radius: 11px; background: var(--surface); border: 1px solid var(--line); padding: 0 4px 0 12px; }
.search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-50); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; height: 100%; font-size: 14px; }
.search button { width: 32px; height: 32px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; }
.search button:hover { color: var(--primary); background: var(--primary-50); }
.result-line { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.empty { text-align: center; padding: 70px 20px; color: var(--muted); background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius); }
.empty i { font-size: 34px; color: var(--faint); margin-bottom: 12px; display: block; }
.empty h3 { font-size: 18px; margin-bottom: 6px; }

/* 分页（ThinkPHP 输出 ul.pagination） */
.pagination-wrap { margin-top: 36px; display: flex; justify-content: center; }
.pagination { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.pagination li > a, .pagination li > span { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 10px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); color: var(--text); font-size: 14px; }
.pagination li > a:hover { border-color: var(--primary); color: var(--primary); }
.pagination li.active > span { background: var(--primary); border-color: var(--primary); color: #fff; }
.pagination li.disabled > span { color: var(--faint); }

/* 详情页 */
.detail-head { display: flex; gap: 22px; align-items: flex-start; }
.detail-icon { width: 76px; height: 76px; flex-shrink: 0; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); display: inline-flex; align-items: center; justify-content: center; font-size: 32px; color: var(--primary); overflow: hidden; }
.detail-icon img { width: 100%; height: 100%; object-fit: cover; }
.detail-title { flex: 1; min-width: 0; }
.detail-title .pill { margin-right: 6px; margin-bottom: 8px; }
.detail-title h1 { font-size: clamp(28px, 3.2vw, 38px); font-weight: 800; }
.detail-title p { margin-top: 8px; color: var(--muted); font-size: 16px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 16px; color: var(--muted); font-size: 13.5px; }
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }
.meta-row i { color: var(--faint); }
.detail-actions { display: flex; flex-direction: column; gap: 10px; align-items: stretch; min-width: 210px; }
.detail-actions small { color: var(--muted); font-size: 12.5px; text-align: center; }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 28px; }
.panel + .panel { margin-top: 20px; }
.panel-title { display: flex; align-items: center; gap: 10px; font-size: 18px; margin-bottom: 18px; }
.panel-title i { color: var(--primary); }
.side { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 20px; }
.side .panel { padding: 22px; }
.side .panel-title { font-size: 16px; margin-bottom: 14px; }
.spec { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec th, .spec td { padding: 10px 0; border-bottom: 1px dashed var(--line); text-align: left; vertical-align: top; }
.spec tr:last-child th, .spec tr:last-child td { border-bottom: 0; }
.spec th { color: var(--muted); font-weight: 500; width: 92px; white-space: nowrap; }
.spec td { color: var(--ink); word-break: break-all; }
.spec code { font-size: 12px; color: var(--text); }
.check-list { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.check-list li { position: relative; padding-left: 22px; font-size: 14px; color: var(--text); }
.check-list li::before { content: "\f00c"; font-family: FontAwesome; position: absolute; left: 0; top: 1px; color: var(--green); font-size: 12px; }
.related a { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 0; border-bottom: 1px dashed var(--line); color: var(--text); font-size: 14px; }
.related a:last-child { border-bottom: 0; }
.related a:hover { color: var(--primary); }
.related a small { color: var(--faint); flex-shrink: 0; }

/* 截图画廊 */
.gallery-main { position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); background: var(--surface-2); cursor: zoom-in; }
.gallery-main img { display: block; width: 100%; height: auto; }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; overflow-x: auto; padding-bottom: 4px; }
.gallery-thumbs button { flex: 0 0 120px; height: 78px; padding: 0; border-radius: 10px; overflow: hidden; border: 2px solid transparent; background: var(--surface-2); cursor: pointer; opacity: .7; transition: opacity .15s ease, border-color .15s ease; }
.gallery-thumbs button img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.gallery-thumbs button:hover { opacity: 1; }
.gallery-thumbs button.active { border-color: var(--primary); opacity: 1; }
.lightbox { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 30px; background: rgba(5, 10, 20, .86); cursor: zoom-out; }
.lightbox.open { display: flex; }
.lightbox img { max-width: min(1200px, 100%); max-height: 100%; border-radius: 12px; box-shadow: 0 30px 80px rgba(0, 0, 0, .5); }

/* 功能要点网格 */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; list-style: none; }
.feature-grid li { padding: 14px 16px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line); font-size: 14px; color: var(--text); line-height: 1.7; }
.feature-grid li b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 2px; }

/* 更新日志 */
.changelog { list-style: none; position: relative; }
.changelog > li { position: relative; padding-left: 26px; padding-bottom: 18px; }
.changelog > li::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 0; width: 2px; background: var(--line); }
.changelog > li::after { content: ""; position: absolute; left: 0; top: 5px; width: 12px; height: 12px; border-radius: 50%; background: var(--surface); border: 3px solid var(--primary); }
.changelog > li:last-child { padding-bottom: 0; }
.changelog > li:last-child::before { display: none; }
.changelog h4 { font-size: 15px; margin-bottom: 6px; }
.changelog ul { list-style: disc; padding-left: 18px; color: var(--muted); font-size: 14px; }
.changelog ul li { margin: 3px 0; }

/* 富文本内容 */
.prose { color: var(--text); font-size: 15.5px; line-height: 1.9; }
.prose > *:first-child { margin-top: 0; }
.prose h2 { font-size: 22px; margin: 30px 0 12px; }
.prose h3 { font-size: 18px; margin: 24px 0 10px; }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin: 6px 0; }
.prose img { border-radius: 12px; border: 1px solid var(--line); margin: 8px 0; }
.prose blockquote { margin: 16px 0; padding: 12px 18px; border-left: 3px solid var(--primary); background: var(--primary-50); border-radius: 0 10px 10px 0; color: var(--text); }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose code { background: var(--surface-2); padding: 2px 6px; border-radius: 6px; font-size: 13px; }
.prose table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; }

/* 下载提示 / aria2 / 校验 */
.notice { display: flex; gap: 12px; padding: 14px 16px; border-radius: 12px; background: var(--primary-50); color: var(--text); font-size: 14px; line-height: 1.7; }
.notice > i { color: var(--primary); margin-top: 4px; }
.notice-amber { background: var(--amber-50); }
.notice-amber > i { color: var(--amber); }
.code-box { position: relative; margin-top: 12px; }
.code-box code { display: block; padding: 14px 16px; padding-right: 80px; border-radius: 12px; background: #0b1424; color: #d6e4ff; font-size: 12.5px; line-height: 1.7; white-space: pre-wrap; word-break: break-all; }
.code-box .btn { position: absolute; top: 8px; right: 8px; height: 28px; padding: 0 10px; font-size: 12px; border-radius: 8px; background: rgba(255, 255, 255, .12); color: #fff; }
.how-steps { list-style: none; counter-reset: how; display: flex; flex-direction: column; gap: 12px; }
.how-steps li { counter-increment: how; position: relative; padding-left: 38px; font-size: 14.5px; color: var(--text); line-height: 1.7; }
.how-steps li::before { content: counter(how); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 8px; background: var(--primary-50); color: var(--primary); font-weight: 700; font-size: 13px; display: flex; align-items: center; justify-content: center; }

/* 工具 */
.tool-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 32px; align-items: start; }
.tool-list { display: flex; flex-direction: column; gap: 8px; }
.tool-item { display: flex; align-items: center; gap: 14px; padding: 14px 16px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); color: var(--text); }
.tool-item i.tool-icon { width: 40px; height: 40px; border-radius: 11px; display: inline-flex; align-items: center; justify-content: center; background: var(--primary-50); color: var(--primary); font-size: 17px; flex-shrink: 0; }
.tool-item span { flex: 1; min-width: 0; }
.tool-item strong { display: block; color: var(--ink); font-size: 15px; }
.tool-item small { display: block; color: var(--muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool-item:hover, .tool-item.active { border-color: var(--primary-100); box-shadow: var(--shadow-sm); color: var(--text); }
.tool-item.active i.tool-icon { background: var(--primary); color: #fff; }
.tool-row { display: flex; gap: 10px; }
.input { width: 100%; height: 44px; padding: 0 14px; border-radius: 11px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); outline: 0; font-size: 14.5px; }
textarea.input { height: auto; padding: 12px 14px; line-height: 1.7; resize: vertical; }
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-50); }
.tool-result { margin-top: 18px; padding: 16px 18px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line); color: var(--text); font-size: 14px; min-height: 60px; word-break: break-all; }
.hash-progress { margin: 16px 0 0; }
.hash-progress canvas { width: 100%; height: 90px; display: block; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }

/* 社区 */
.post-list { display: flex; flex-direction: column; gap: 14px; }
.post-item { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 20px; padding: 16px; }
.post-item .card-cover { aspect-ratio: 16 / 10; border: 1px solid var(--line); border-radius: 12px; }
.post-item h3 { font-size: 18px; margin: 4px 0 8px; }
.post-item p { color: var(--muted); font-size: 14px; }
.post-item small { color: var(--faint); font-size: 12.5px; }
.article { max-width: 780px; }
.article h1 { font-size: clamp(28px, 3.4vw, 38px); font-weight: 800; line-height: 1.35; }
.byline { display: flex; flex-wrap: wrap; gap: 16px; margin: 14px 0 30px; color: var(--muted); font-size: 13.5px; }

/* 商城 */
.price-line { display: flex; align-items: baseline; gap: 8px; margin-top: auto; padding-top: 14px; }
.price-line strong { font-size: 22px; color: var(--red); font-weight: 800; }
.price-line del { color: var(--faint); font-size: 13px; }
.store-detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: start; }
.store-detail .card-cover { border-radius: var(--radius); border: 1px solid var(--line); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--footer-bg); color: #9fb0c8; padding: 64px 0 28px; font-size: 14px; }
.site-footer a { color: #b9c7da; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: 14px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 9px; }
.footer-about { line-height: 1.8; max-width: 320px; }
.site-footer h4 { color: #fff; font-size: 14px; margin-bottom: 16px; font-weight: 600; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.contact-list i { width: 18px; color: #6f86a8; }
.footer-contact { display: flex; gap: 18px; align-items: flex-start; }
.footer-qrcode { flex-shrink: 0; text-align: center; font-size: 12px; }
.footer-qrcode img { width: 96px; height: 96px; border-radius: 10px; background: #fff; padding: 5px; display: block; margin-bottom: 6px; }
.friend-links { margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .08); display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; }
.friend-links span { color: #7288a8; }
.friend-links a { display: inline-flex; align-items: center; gap: 6px; }
.friend-links img { width: 16px; height: 16px; border-radius: 4px; object-fit: cover; }
.footer-bottom { margin-top: 22px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .08); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: 13px; color: #7288a8; }
.footer-bottom .filing { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-bottom .filing a { color: #8ea0bb; display: inline-flex; align-items: center; gap: 5px; }
.footer-bottom .filing img { width: 16px; height: 16px; }

/* ---------- 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
    .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
    .site-menu a { padding: 8px 9px; font-size: 13.5px; }
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .hero-visual { max-width: 760px; margin: 0 auto 40px; width: 100%; }
    .steps { grid-template-columns: repeat(3, 1fr); }
    .step:nth-child(3)::after { display: none; }
    .showcase { grid-template-columns: 1fr; }
    .showcase-tabs { flex-direction: row; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
    .showcase-tab { flex: 0 0 auto; width: auto; }
    .showcase-tab small { display: none; }
    .detail-layout { grid-template-columns: 1fr; }
    .side { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    .menu-toggle { display: inline-flex; }
    .site-menu { position: absolute; left: 0; right: 0; top: 68px; display: none; flex-direction: column; align-items: stretch; gap: 2px; padding: 10px 16px 16px; background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
    .site-menu.open { display: flex; }
    .site-menu a { padding: 12px 12px; font-size: 15px; }
    .header-actions { margin-left: auto; }
    .header-actions .btn-download-text { display: none; }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stats-card { grid-template-columns: repeat(2, 1fr); }
    .stat:nth-child(3) { border-left: 0; }
    .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
    .faq-list { grid-template-columns: 1fr; }
    .cta { flex-direction: column; align-items: flex-start; padding: 40px 32px; }
    .tool-layout { grid-template-columns: 1fr; }
    .store-detail { grid-template-columns: 1fr; }
    .detail-head { flex-wrap: wrap; }
    .detail-actions { width: 100%; flex-direction: row; flex-wrap: wrap; }
    .detail-actions .btn { flex: 1; }
}
/* 8 项导航 + 登录用户胶囊在中等宽度会挤爆顶栏，提前收进汉堡菜单 */
@media (max-width: 1120px) {
    .menu-toggle { display: inline-flex; }
    .site-menu { position: absolute; left: 0; right: 0; top: 68px; display: none; flex-direction: column; align-items: stretch; gap: 2px; margin-left: 0; padding: 10px 16px 16px; background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
    .site-menu.open { display: flex; }
    .site-menu a { padding: 12px 12px; font-size: 15px; }
    .header-actions { margin-left: auto; }
    .header-actions .btn-download-text { display: none; }
}
@media (max-width: 600px) {
    .container { padding: 0 16px; }
    body.site-body { font-size: 14.5px; }
    .header-inner { height: 60px; gap: 10px; }
    .site-menu { top: 60px; }
    .brand { font-size: 15.5px; }
    .brand img { width: 30px; height: 30px; }
    .hero { padding: 44px 0 100px; }
    .hero-lead { font-size: 15.5px; }
    .hero-actions .btn { flex: 1; }
    .app-window.is-small { display: none; }
    .float-chip { right: 8px; top: auto; bottom: -18px; }
    .section { padding: 64px 0; }
    .section-head { flex-direction: column; align-items: flex-start; margin-bottom: 28px; }
    .steps { grid-template-columns: 1fr; }
    .step::after { display: none; }
    .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .point-list, .feature-grid { grid-template-columns: 1fr; }
    .stat { padding: 18px 16px; }
    .stat strong { font-size: 19px; }
    .panel { padding: 20px; }
    .toolbar { flex-direction: column; align-items: stretch; }
    .search { width: 100%; }
    .post-item { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; }
    .cta { padding: 32px 22px; border-radius: 18px; }
    .tool-row { flex-direction: column; }
    .gallery-thumbs button { flex-basis: 96px; height: 62px; }
}

/* 在线客服悬浮按钮 */
.qq-fab { position: fixed; right: 20px; bottom: 20px; z-index: 60; }
.qq-fab > summary { list-style: none; cursor: pointer; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; width: 60px; height: 60px; border-radius: 16px; background: var(--primary); color: #fff; box-shadow: 0 12px 28px -8px rgba(22,104,240,.6); transition: transform .15s ease, background-color .15s ease; }
.qq-fab > summary::-webkit-details-marker { display: none; }
.qq-fab > summary i { font-size: 20px; }
.qq-fab > summary span { font-size: 11px; }
.qq-fab > summary:hover { transform: translateY(-2px); background: var(--primary-600); }
.qq-fab[open] > summary { background: var(--primary-600); }
.qq-fab-panel { position: absolute; right: 0; bottom: 72px; width: 260px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); padding: 12px; animation: fade-up .2s ease; }
.qq-fab-title { font-size: 13px; font-weight: 700; color: var(--ink); padding: 4px 6px 10px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.qq-fab-item { display: flex; align-items: center; gap: 12px; padding: 10px 8px; border-radius: 10px; color: var(--text); }
.qq-fab-item:hover { background: var(--primary-50); color: var(--primary); }
.qq-fab-item > i:first-child { width: 34px; height: 34px; flex-shrink: 0; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; background: var(--primary-50); color: var(--primary); font-size: 16px; }
.qq-fab-item span { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.qq-fab-item strong { font-size: 14px; color: var(--ink); }
.qq-fab-item small { font-size: 12px; color: var(--muted); }
.qq-fab-item:hover strong { color: var(--primary); }
.qq-fab-item > i:last-child { color: var(--faint); font-size: 12px; }
.qq-fab-group { margin-top: 8px; padding: 10px 8px 4px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.qq-fab-group strong { color: var(--ink); }
.qq-fab-group a { margin-left: 4px; font-weight: 600; }
@media (max-width: 600px) { .qq-fab { right: 14px; bottom: 14px; } .qq-fab-panel { width: 232px; } }