/* ZERO桌面 官网：首页、隐私政策、服务条款共用。深色玻璃质感，和软件本身的面板风格一致。 */
:root {
  --bg: #0b1220;
  --bg-2: #101a2c;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eef3fb;
  --muted: #a7b3c6;
  --faint: #6f7d93;
  --accent: #2f8cff;
  --accent-2: #4fc3f7;
  --warm: #ffb74d;
  --radius: 16px;
  --max: 1160px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(900px 520px at 85% -10%, rgba(47, 140, 255, 0.22), transparent 60%),
    radial-gradient(700px 480px at -10% 20%, rgba(79, 195, 247, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.7 "Segoe UI", "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.wrap { width: min(var(--max), 100% - 32px); margin: 0 auto; }

/* ---------- 测试阶段提示条 ---------- */
.beta { background: linear-gradient(90deg, rgba(255, 183, 77, 0.16), rgba(47, 140, 255, 0.14)); border-bottom: 1px solid var(--line); font-size: 14px; color: #f3e2c3; }
.beta .wrap { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; padding: 8px 0; text-align: center; }
.beta b { color: var(--warm); }
.beta a { color: var(--accent-2); font-weight: 600; }

/* ---------- 意见反馈弹窗 ---------- */
.feedback-dialog { width: min(520px, calc(100% - 32px)); border: 1px solid var(--line); border-radius: 18px; padding: 0; background: #121c2e; color: var(--text); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55); }
.feedback-dialog::backdrop { background: rgba(5, 10, 20, 0.6); backdrop-filter: blur(3px); }
.feedback-form { display: grid; gap: 14px; padding: 26px 26px 22px; }
.feedback-form h2 { margin: 0; font-size: 22px; }
.feedback-hint, .feedback-note { margin: 0; color: var(--muted); font-size: 14px; }
.feedback-note { font-size: 12px; color: var(--faint); }
.feedback-form label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.feedback-form textarea, .feedback-form input { width: 100%; border: 1px solid var(--line); border-radius: 10px; background: rgba(255, 255, 255, 0.04); color: var(--text); padding: 10px 12px; font: inherit; resize: vertical; }
.feedback-form textarea:focus, .feedback-form input:focus { outline: 2px solid rgba(47, 140, 255, 0.45); border-color: var(--accent); }
.feedback-actions { display: flex; justify-content: flex-end; gap: 10px; }
.feedback-actions .btn { padding: 9px 20px; cursor: pointer; }
.feedback-actions .btn:disabled { opacity: 0.6; cursor: default; }
.feedback-status { margin: 0; min-height: 1.4em; font-size: 14px; }
.feedback-status.ok { color: #81c784; }
.feedback-status.error { color: #ff8a80; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(11, 18, 32, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.nav nav { display: flex; gap: 22px; margin-left: auto; }
.nav nav a { color: var(--muted); font-size: 15px; }
.nav nav a:hover { color: var(--text); text-decoration: none; }
.nav .btn { padding: 8px 16px; font-size: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #1f6fe0);
  color: #fff; font-weight: 600; border: 0;
  box-shadow: 0 8px 24px rgba(47, 140, 255, 0.35);
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.ghost { background: var(--panel); box-shadow: none; border: 1px solid var(--line); }

/* ---------- 首屏 ---------- */
.hero { padding: 84px 0 56px; }
.eyebrow { display: inline-block; padding: 4px 12px; border-radius: 999px; background: rgba(47, 140, 255, 0.14); color: var(--accent-2); font-size: 13px; font-weight: 600; letter-spacing: 0.04em; }
.hero h1 { font-size: clamp(36px, 5vw, 56px); line-height: 1.15; margin: 18px 0 18px; letter-spacing: -0.01em; }
.hero h1 span { background: linear-gradient(90deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); font-size: 18px; margin: 0 0 30px; max-width: 34em; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .meta { margin-top: 18px; color: var(--faint); font-size: 14px; }

/* 首屏：软件打开后的桌面示意。画布固定 1280×720，按页面宽度等比缩放（assets/mockup.js），
   面板样式照软件里的真实样式：半透明深灰 #99202020、1px 浅色描边、8px 圆角。 */
.hero-text { text-align: center; max-width: 860px; }
.hero-text h1 span { display: block; }
.hero-text .lead { margin-left: auto; margin-right: auto; }
.hero-text .actions { justify-content: center; }
.screen {
  position: relative; margin: 44px 0 0; aspect-ratio: 16 / 9; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line); box-shadow: 0 40px 100px rgba(0, 0, 0, 0.5);
  /* 通用的渐变壁纸，不是谁的真实桌面。 */
  background:
    radial-gradient(60% 80% at 75% 20%, rgba(79, 195, 247, 0.55), transparent 60%),
    radial-gradient(55% 70% at 20% 85%, rgba(126, 87, 194, 0.55), transparent 60%),
    radial-gradient(40% 50% at 50% 50%, rgba(30, 136, 255, 0.35), transparent 70%),
    linear-gradient(160deg, #10284a, #0b1630 55%, #1d1240);
}
.stage { position: absolute; left: 0; top: 0; width: 1280px; height: 720px; transform-origin: 0 0; color: #ddd; font-size: 13px; line-height: 1.4; }
.pn { position: absolute; background: rgba(32, 32, 32, 0.6); border: 1px solid rgba(255, 255, 255, 0.4); border-radius: 8px; backdrop-filter: blur(18px); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25); }
.pn-title { display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 10px; color: #fff; font-size: 14px; }
.pn-title > span:first-child, .pn-title .month { margin-right: auto; }
.pn-title img { width: 18px; height: 18px; }
.pn-title small { color: rgba(255, 255, 255, 0.6); font-size: 11px; margin-right: auto; }
.pn-title img + span { margin-right: 0; }

/* 标题栏和工具栏的线条图标：用 SVG 做遮罩，颜色跟着文字走。 */
.ic, .t { display: inline-block; width: 16px; height: 16px; background: currentColor; color: #ddd; -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; }
.ic-menu { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M4 7h16M4 12h16M4 17h16'/%3E%3C/svg%3E"); }
.ic-lock { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Crect x='5' y='11' width='14' height='10' rx='2'/%3E%3Cpath d='M8 11V8a4 4 0 0 1 8 0v3'/%3E%3C/svg%3E"); }
.ic-collapse { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 15 6-6 6 6'/%3E%3C/svg%3E"); }

/* 收纳盒：标签页 + 图标网格 */
.tabs { display: flex; gap: 4px; padding: 0 8px 6px; }
.tabs b { font-weight: 400; padding: 4px 12px; border-radius: 4px; color: #ddd; }
.tabs b.on { background: #1e88ff; color: #fff; }
.items { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px 4px; padding: 6px 10px 14px; }
.it { display: grid; justify-items: center; gap: 6px; text-align: center; color: #fff; font-size: 12px; padding: 6px 2px; border-radius: 4px; }
.it:first-child { background: rgba(255, 255, 255, 0.2); }
.fi { width: 38px; height: 46px; border-radius: 4px; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 2px; font-style: normal; font-weight: 700; font-size: 10px; line-height: 16px; color: #fff; background: linear-gradient(to top, var(--c) 18px, transparent 18px), linear-gradient(#fff, #e9edf2); }
.fd { width: 46px; height: 38px; margin-top: 8px; border-radius: 4px; background: linear-gradient(#ffd66b, #f4b400); position: relative; }
.fd::before { content: ""; position: absolute; left: 0; top: -5px; width: 20px; height: 8px; border-radius: 3px 3px 0 0; background: #e8a800; }
.ai { width: 46px; height: 46px; border-radius: 12px; background: linear-gradient(145deg, var(--a), var(--b)); display: grid; place-items: center; font-style: normal; font-size: 22px; color: #fff; box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25); }

/* 时钟面板 */
.clock-main { display: flex; align-items: flex-end; justify-content: space-between; padding: 0 14px; }
.big { font-size: 46px; font-weight: 300; color: #fff; letter-spacing: 1px; line-height: 1.1; }
.city { color: #4fc3f7; font-size: 13px; margin-left: 10px; }
.weather { display: grid; justify-items: end; padding-bottom: 8px; color: #fff; }
.weather span { font-size: 20px; }
.weather small { color: rgba(255, 255, 255, 0.8); font-size: 12px; }
.date { color: rgba(255, 255, 255, 0.87); padding: 2px 16px 0; }
.line { height: 1px; background: rgba(255, 255, 255, 0.2); margin: 12px 14px 8px; }
.sub { display: grid; grid-template-columns: 52px 56px 72px 40px 1fr; padding: 3px 16px; color: rgba(255, 255, 255, 0.87); }
.sub b { color: #fff; font-weight: 400; }
.sub span:last-child { text-align: right; }
.tools { display: flex; flex-wrap: wrap; gap: 10px; padding: 12px 14px 14px; }
.t { width: 18px; height: 18px; position: relative; }
.t em { position: absolute; right: -9px; top: -7px; background: #ffb74d; color: #2a1a00; font: 700 9px/13px "Segoe UI", sans-serif; min-width: 13px; padding: 0 3px; border-radius: 7px; text-align: center; -webkit-mask: none; mask: none; }
.t-mail { -webkit-mask: none; mask: none; background: none; }
.t-mail::before { content: ""; position: absolute; inset: 0; background: #ddd; -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; }
.t-organize { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Crect x='3' y='3' width='7' height='7' rx='1.5'/%3E%3Crect x='14' y='3' width='7' height='7' rx='1.5'/%3E%3Crect x='3' y='14' width='7' height='7' rx='1.5'/%3E%3Crect x='14' y='14' width='7' height='7' rx='1.5'/%3E%3C/svg%3E"); }
.t-add { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E"); }
.t-eye { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Cpath d='M2 12s3.6-7 10-7 10 7 10 7-3.6 7-10 7S2 12 2 12z'/%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3C/svg%3E"); }
.t-shot { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M4 8V5a1 1 0 0 1 1-1h3M16 4h3a1 1 0 0 1 1 1v3M20 16v3a1 1 0 0 1-1 1h-3M8 20H5a1 1 0 0 1-1-1v-3'/%3E%3C/svg%3E"); }
.t-rec { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Crect x='2' y='6' width='14' height='12' rx='2'/%3E%3Cpath d='m16 10 6-3v10l-6-3'/%3E%3C/svg%3E"); }
.t-search { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E"); }
.t-mail { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Crect x='3' y='5' width='18' height='14' rx='2'/%3E%3Cpath d='m3 7 9 6 9-6'/%3E%3C/svg%3E"); }
.t-down { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 3v12m0 0-5-5m5 5 5-5M5 21h14'/%3E%3C/svg%3E"); }
.t-cal { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Crect x='3' y='5' width='18' height='16' rx='2'/%3E%3Cpath d='M16 3v4M8 3v4M3 10h18'/%3E%3C/svg%3E"); }
.t-globe { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M3 12h18M12 3a14 14 0 0 1 0 18M12 3a14 14 0 0 0 0 18'/%3E%3C/svg%3E"); }
.t-shield { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Cpath d='M12 3 4 6v6c0 4.5 3.4 8.3 8 9 4.6-.7 8-4.5 8-9V6z'/%3E%3C/svg%3E"); }
.t-gear { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3Cpath d='M12 2v3M12 19v3M2 12h3M19 12h3M4.9 4.9 7 7M17 17l2.1 2.1M4.9 19.1 7 17M17 7l2.1-2.1'/%3E%3C/svg%3E"); }

/* 万年历 */
.cal .pn-title span:first-child { margin-right: 0; }
.cal .month { font-size: 16px; text-align: center; margin: 0 6px; }
.cal .country { margin-left: auto; margin-right: 6px; font-size: 11.5px; color: #4fc3f7; }
.week, .days { display: grid; grid-template-columns: repeat(7, 1fr); padding: 0 10px; }
.week b { font-weight: 400; text-align: center; color: rgba(255, 255, 255, 0.6); padding: 4px 0; }
.week b.we { color: #ff8a80; }
.days { padding-bottom: 12px; gap: 2px; }
.days i { position: relative; font-style: normal; text-align: center; font-size: 15px; color: #fff; padding: 3px 0 2px; border-radius: 5px; }
.days i s { display: block; text-decoration: none; font-size: 10.5px; color: rgba(255, 255, 255, 0.6); }
.days i.dim { opacity: 0.35; }
.days i.we { color: #ff8a80; }
.days i.rest::after, .days i.work::after { position: absolute; right: 4px; top: 1px; font-size: 9.5px; }
.days i.rest::after { content: "休"; color: #ff8a80; }
.days i.work::after { content: "班"; color: #ffb74d; }
.days i.rest { background: rgba(255, 138, 128, 0.12); }
.days i.today { background: #1e88ff; }
.days i.today s { color: #fff; }

/* 重要邮件提醒（右下角弹窗） */
.toast { position: absolute; right: 28px; bottom: 74px; width: 360px; padding: 13px 16px 14px; border-radius: 9px; background: rgba(24, 40, 54, 0.97); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45); }
.toast-head { display: flex; justify-content: space-between; color: rgba(255, 255, 255, 0.6); }
.toast-head b { color: #4fc3f7; font-weight: 600; }
.toast-subj { color: #fff; font-size: 16px; font-weight: 600; margin: 6px 0 2px; }
.toast-from { color: #fff; }
.toast-foot { display: flex; justify-content: space-between; color: rgba(255, 255, 255, 0.6); font-size: 11px; margin-top: 9px; }

/* 任务栏 */
.taskbar { position: absolute; left: 0; right: 0; bottom: 0; height: 48px; background: rgba(20, 24, 34, 0.82); backdrop-filter: blur(20px); border-top: 1px solid rgba(255, 255, 255, 0.08); display: flex; align-items: center; justify-content: center; }
.tb-apps { display: flex; gap: 10px; }
.tb-apps i { width: 32px; height: 32px; border-radius: 6px; background: rgba(255, 255, 255, 0.14); display: grid; place-items: center; }
.tb-apps i.win { background: linear-gradient(135deg, #4fc3f7, #1e88ff); clip-path: polygon(0 0, 47% 0, 47% 47%, 0 47%, 0 53%, 47% 53%, 47% 100%, 0 100%, 0 53%, 53% 53%, 53% 100%, 100% 100%, 100% 53%, 53% 53%, 53% 47%, 100% 47%, 100% 0, 53% 0, 53% 47%, 0 47%); border-radius: 2px; width: 26px; height: 26px; margin: 3px; }
.tb-apps i.zero { background: rgba(255, 255, 255, 0.18); }
.tb-apps i.zero img { width: 22px; height: 22px; }
.tb-tray { position: absolute; right: 16px; color: #fff; font-size: 11px; text-align: right; line-height: 1.35; }

/* ---------- 通用区块 ---------- */
section { padding: 72px 0; }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.25; margin: 10px 0 12px; }
.section-head p { color: var(--muted); margin: 0; font-size: 17px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; transition: background 0.2s, transform 0.2s;
}
.card:hover { background: var(--panel-strong); transform: translateY(-2px); }
.card .ico {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(47, 140, 255, 0.28), rgba(79, 195, 247, 0.12));
  color: var(--accent-2); margin-bottom: 14px;
}
.card .ico svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- 跨时区协作 ---------- */
.global .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.zones { border-radius: 8px; border: 1px solid rgba(255, 255, 255, 0.4); background: rgba(32, 32, 32, 0.78); padding: 18px; box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45); }
.zones-head { display: flex; justify-content: space-between; align-items: center; font-weight: 600; margin-bottom: 10px; }
.zones-head em { font-style: normal; font-size: 12px; color: var(--warm); font-weight: 500; }
.zone { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; }
.zone + .zone { border-top: 1px solid var(--line); border-radius: 0; }
.zone b { display: block; font-size: 15px; }
.zone small { color: var(--muted); font-size: 12px; }
.zone strong { font-size: 26px; font-weight: 600; font-variant-numeric: tabular-nums; }
.zone.main { background: rgba(47, 140, 255, 0.16); }
.zone.main strong { font-size: 34px; color: var(--accent-2); }
.zones-tip { margin: 12px 2px 0; color: var(--faint); font-size: 13px; }

/* ---------- 邮箱专区 ---------- */
.mail { background: linear-gradient(180deg, transparent, rgba(47, 140, 255, 0.06), transparent); }
.mail .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checks li { display: grid; grid-template-columns: 24px 1fr; gap: 10px; }
.checks li::before { content: "✓"; color: var(--accent-2); font-weight: 700; }
.checks b { color: var(--text); }
.checks span { color: var(--muted); }

.mailbox { border-radius: 8px; overflow: hidden; border: 1px solid rgba(255, 255, 255, 0.4); background: rgba(32, 32, 32, 0.82); box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45); }
.mailbox .bar { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.mailbox .avatar { width: 26px; height: 26px; border-radius: 50%; background: #1a73e8; display: grid; place-items: center; font-size: 12px; font-weight: 700; }
.mailbox .search { flex: 1; height: 26px; border-radius: 6px; background: rgba(255, 255, 255, 0.06); }
.mailbox .tool { width: 26px; height: 26px; border-radius: 6px; background: rgba(255, 255, 255, 0.08); }
.mailbox .body { display: grid; grid-template-columns: 30% 70%; min-height: 300px; }
.mailbox .side { border-right: 1px solid var(--line); padding: 10px; display: grid; gap: 6px; align-content: start; }
.mailbox .side i { height: 22px; border-radius: 4px; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.12); display: block; font-style: normal; font-size: 11px; color: var(--muted); padding-left: 8px; line-height: 20px; }
.mailbox .side i.cur { background: rgba(255, 255, 255, 0.24); color: var(--text); }
.mailbox .side small { color: var(--faint); font-size: 10px; margin-top: 6px; }
.mailbox .list { padding: 8px; display: grid; gap: 6px; align-content: start; }
.msg { position: relative; padding: 9px 10px 9px 14px; border-radius: 4px; }
.msg.sel { background: rgba(79, 195, 247, 0.25); }
.msg.hot::before { content: ""; position: absolute; left: 3px; top: 8px; bottom: 8px; width: 3px; border-radius: 2px; background: var(--warm); }
.msg .from { font-size: 12px; font-weight: 700; display: flex; justify-content: space-between; }
.msg .from em { font-style: normal; font-weight: 400; color: var(--muted); }
.msg .subj { font-size: 12px; margin-top: 2px; }
.msg .tag { display: inline-block; background: var(--warm); color: #2a1a00; font-size: 10px; font-weight: 700; border-radius: 3px; padding: 0 4px; margin-right: 5px; }
.msg .snip { font-size: 11px; color: var(--faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- 隐私承诺 ---------- */
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.trust .card h3 { display: flex; align-items: center; gap: 8px; }

/* ---------- 下载 ---------- */
.download { text-align: center; }
.download .panel { background: linear-gradient(135deg, rgba(47, 140, 255, 0.22), rgba(79, 195, 247, 0.08)); border: 1px solid var(--line); border-radius: 22px; padding: 56px 24px; }
.download h2 { font-size: clamp(28px, 3.4vw, 38px); margin: 0 0 10px; }
.download p { color: var(--muted); margin: 0 0 26px; }
.download .note { margin-top: 16px; font-size: 14px; color: var(--faint); }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--line); padding: 34px 0 44px; color: var(--faint); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; justify-content: space-between; }
footer nav { display: flex; gap: 22px; flex-wrap: wrap; }
footer a { color: var(--muted); }

/* ---------- 文档页（隐私政策、服务条款） ---------- */
.doc { padding: 56px 0 80px; }
.doc .wrap { max-width: 860px; }
.doc h1 { font-size: clamp(30px, 4vw, 42px); margin: 0 0 6px; }
.doc .updated { color: var(--faint); margin: 0 0 28px; }
.doc h2 { font-size: 22px; margin: 40px 0 10px; padding-top: 8px; }
.doc h3 { font-size: 18px; margin: 26px 0 8px; }
.doc p, .doc li { color: #d3dceb; }
.doc ul { padding-left: 1.3em; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; display: block; overflow-x: auto; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--panel); white-space: nowrap; }
.doc .callout { background: rgba(47, 140, 255, 0.1); border: 1px solid rgba(47, 140, 255, 0.35); border-radius: 12px; padding: 16px 18px; margin: 18px 0; }
.doc .lang-switch { display: inline-flex; gap: 8px; margin-bottom: 26px; }
.doc .lang-switch a { padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }

/* ---------- 窄屏 ---------- */
@media (max-width: 900px) {
  .mail .wrap, .global .wrap { grid-template-columns: 1fr; gap: 40px; }
  .global .zones { order: 2; }
  .features, .trust { grid-template-columns: repeat(2, 1fr); }
  .nav nav a:not(.btn) { display: none; }
}
@media (max-width: 600px) {
  .features, .trust { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
  /* 手机上示意图很小，时钟面板只留时间和第一行，免得撑高后压到日历。 */
  .clock .sub + .sub { display: none; }
  .clock .sub { white-space: nowrap; }
  .hero { padding: 48px 0 32px; }
}