/* UC浏览器下载站 style.css —— 暖纸底 + 墨字 + UC橙点缀，紧凑布局 */
:root {
  --paper: #faf8f4;
  --ink: #26231e;
  --ink-2: #5a554b;
  --ink-3: #8a8378;
  --line: #e6e1d7;
  --orange: #ff5a1f;
  --orange-deep: #e04a12;
  --orange-soft: #fff1e8;
  --card: #ffffff;
  --ok: #2e9e5b;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  font-size: 15px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 22px; }

/* header */
.header { background: rgba(250,248,244,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.header-in { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.logo img { width: 34px; height: 34px; }
.logo em { font-style: normal; color: var(--orange); }
.nav { display: flex; gap: 4px; }
.nav a { padding: 7px 13px; border-radius: 8px; color: var(--ink-2); font-size: 14px; transition: all .18s; }
.nav a:hover { background: #f0ece3; color: var(--ink); }
.nav a.on { background: var(--orange-soft); color: var(--orange-deep); font-weight: 600; }
.header-cta { background: var(--orange); color: #fff !important; font-weight: 600; padding: 8px 18px !important; border-radius: 9px !important; box-shadow: 0 3px 10px rgba(255,90,31,.28); }
.header-cta:hover { background: var(--orange-deep); }

/* kicker */
.kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; letter-spacing: 2px; color: var(--orange-deep); font-weight: 600; margin-bottom: 10px; }
.kicker::before { content: ""; width: 18px; height: 2px; background: var(--orange); border-radius: 2px; }
.sec { padding: 54px 0; }
.sec-head { margin-bottom: 28px; }
.sec-head h2 { font-size: 26px; letter-spacing: .5px; }
.sec-head p { color: var(--ink-3); margin-top: 6px; font-size: 14.5px; }

/* hero */
.hero { background: linear-gradient(180deg, #fff8f2 0%, var(--paper) 100%); border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-in { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; padding: 56px 0 48px; }
.hero h1 { font-size: 38px; line-height: 1.28; letter-spacing: 1px; }
.hero h1 b { color: var(--orange); }
.hero .lead { color: var(--ink-2); margin: 16px 0 24px; font-size: 15.5px; max-width: 480px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 10px; font-weight: 600; font-size: 15px; cursor: pointer; border: none; transition: all .2s; font-family: inherit; }
.btn svg { width: 17px; height: 17px; }
.btn-o { background: var(--orange); color: #fff; box-shadow: 0 4px 14px rgba(255,90,31,.3); }
.btn-o:hover { background: var(--orange-deep); transform: translateY(-1px); }
.btn-g { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn-g:hover { border-color: var(--orange); color: var(--orange-deep); }
.hero-shot { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; box-shadow: 0 18px 44px rgba(60,40,20,.12); background: #fff; }
.hero-shot img { width: 100%; }
.hero-meta { display: flex; gap: 22px; margin-top: 20px; flex-wrap: wrap; }
.hero-meta span { font-size: 13px; color: var(--ink-3); display: inline-flex; align-items: center; gap: 6px; }
.hero-meta i { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); display: inline-block; }

/* quick stats bar */
.quickbar { border-bottom: 1px solid var(--line); background: #fff; }
.quickbar-in { display: grid; grid-template-columns: repeat(4, 1fr); padding: 18px 0; }
.qb { text-align: center; border-left: 1px solid var(--line); }
.qb:first-child { border-left: none; }
.qb b { font-size: 20px; color: var(--orange-deep); display: block; }
.qb span { font-size: 12.5px; color: var(--ink-3); }

/* cards */
.grid { display: grid; gap: 18px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 13px; padding: 24px; transition: all .2s; align-items: start; }
.card:hover { box-shadow: 0 10px 28px rgba(60,40,20,.09); transform: translateY(-2px); }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: 14px; }
.card .ic { width: 42px; height: 42px; border-radius: 11px; background: var(--orange-soft); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.card .ic svg { width: 21px; height: 21px; stroke: var(--orange-deep); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card .num { font-size: 12px; color: var(--ink-3); letter-spacing: 1.5px; font-weight: 600; }

/* feature shot rows */
.frow { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; margin-bottom: 44px; }
.frow:last-child { margin-bottom: 0; }
.frow.rev .frow-txt { order: -1; }
.frow-txt h3 { font-size: 21px; margin-bottom: 10px; }
.frow-txt p { color: var(--ink-2); font-size: 14.5px; }
.frow-txt ul { margin-top: 12px; }
.frow-txt li { list-style: none; padding: 5px 0 5px 24px; position: relative; color: var(--ink-2); font-size: 14px; }
.frow-txt li::before { content: "✓"; position: absolute; left: 2px; color: var(--ok); font-weight: 700; }
.frow-shot { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; box-shadow: 0 10px 26px rgba(60,40,20,.08); }
.frow-shot img { width: 100%; }

/* download area */
.dl-panel { background: linear-gradient(135deg, #fff8f2, #fffdf9); border: 1px solid #f3ddd0; border-radius: 16px; padding: 34px; }
.dl-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 22px; }
.dl-card { background: #fff; border: 1px solid var(--line); border-radius: 13px; padding: 24px; display: flex; align-items: center; gap: 18px; }
.dl-card .dl-ic { width: 52px; height: 52px; border-radius: 13px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.dl-card .dl-ic svg { width: 26px; height: 26px; }
.dl-ic.quark { background: #eaf4ff; }
.dl-ic.quark svg { stroke: #2b7de0; }
.dl-ic.baidu { background: #eaf7ef; }
.dl-ic.baidu svg { stroke: #2e9e5b; }
.dl-card h4 { font-size: 16px; }
.dl-card p { font-size: 12.5px; color: var(--ink-3); margin: 3px 0 10px; }
.dl-card .btn { padding: 9px 20px; font-size: 13.5px; }
.dl-warn { margin-top: 16px; font-size: 13px; color: var(--ink-2); background: #fff7e8; border: 1px solid #f5e3bd; padding: 10px 14px; border-radius: 9px; display: flex; gap: 8px; align-items: flex-start; }
.dl-warn b { color: #b07a10; }

/* table */
.tbl { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: 14px; }
.tbl th, .tbl td { padding: 11px 16px; text-align: left; border-bottom: 1px solid var(--line); }
.tbl th { background: #f6f2ea; font-size: 13px; color: var(--ink-2); font-weight: 600; }
.tbl tr:last-child td { border-bottom: none; }
.tbl td:first-child { color: var(--ink-3); width: 150px; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: 13px; padding: 22px; }
.step b { display: inline-flex; width: 30px; height: 30px; border-radius: 50%; background: var(--orange); color: #fff; align-items: center; justify-content: center; font-size: 14px; margin-bottom: 12px; }
.step h4 { font-size: 15.5px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--ink-2); }

/* users */
.users { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.u-card { background: #fff; border: 1px solid var(--line); border-radius: 13px; padding: 22px; }
.u-card .u-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.u-card img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.u-card .u-name { font-weight: 600; font-size: 14px; }
.u-card .u-star { color: #f5a623; font-size: 12.5px; letter-spacing: 1px; }
.u-card p { font-size: 13.5px; color: var(--ink-2); }

/* faq */
details { background: #fff; border: 1px solid var(--line); border-radius: 11px; padding: 16px 20px; margin-bottom: 12px; }
details summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
details summary::after { content: "+"; color: var(--orange); font-size: 20px; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin-top: 10px; color: var(--ink-2); font-size: 14px; }

/* versions log */
.vlog { position: relative; padding-left: 26px; }
.vlog::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.v-item { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px 24px; margin-bottom: 16px; }
.v-item::before { content: ""; position: absolute; left: -26px; top: 26px; width: 12px; height: 12px; border-radius: 50%; background: var(--orange); border: 3px solid var(--paper); }
.v-item h3 { font-size: 16.5px; }
.v-item .v-date { font-size: 12.5px; color: var(--ink-3); margin: 2px 0 12px; }
.v-item li { list-style: none; padding: 4px 0 4px 22px; position: relative; color: var(--ink-2); font-size: 14px; }
.v-item li::before { content: "·"; position: absolute; left: 8px; color: var(--orange); font-weight: 700; }
.v-tag { display: inline-block; font-size: 11.5px; background: var(--orange-soft); color: var(--orange-deep); border-radius: 5px; padding: 2px 9px; font-weight: 600; margin-left: 10px; vertical-align: 2px; }

/* doc layout */
.doc { max-width: 1160px; margin: 0 auto; padding: 40px 22px; display: grid; grid-template-columns: 220px 1fr; gap: 44px; }
.doc.single { display: block; }
.toc { position: sticky; top: 84px; align-self: start; }
.toc h4 { font-size: 13px; letter-spacing: 1.5px; color: var(--ink-3); margin-bottom: 12px; }
.toc a { display: block; padding: 6px 12px; font-size: 13.5px; color: var(--ink-2); border-left: 2px solid var(--line); transition: all .15s; }
.toc a:hover, .toc a.on { color: var(--orange-deep); border-left-color: var(--orange); background: #fdf6ef; }
.doc-body h2 { font-size: 22px; margin: 34px 0 14px; padding-top: 10px; }
.doc-body h2:first-child { margin-top: 0; }
.doc-body h3 { font-size: 17px; margin: 22px 0 10px; }
.doc-body p { color: var(--ink-2); margin-bottom: 12px; font-size: 14.5px; }
.doc-body li { color: var(--ink-2); margin-left: 20px; margin-bottom: 6px; font-size: 14.5px; }
.doc-body img { border: 1px solid var(--line); border-radius: 10px; margin: 14px 0; }

/* page hero (subpages) */
.page-hero { background: linear-gradient(180deg, #fff8f2, var(--paper)); border-bottom: 1px solid var(--line); padding: 44px 0 38px; }
.page-hero h1 { font-size: 30px; }
.page-hero p { color: var(--ink-3); margin-top: 8px; font-size: 14.5px; }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.crumb a { color: var(--ink-2); }
.crumb a:hover { color: var(--orange-deep); }

/* footer */
.footer { border-top: 1px solid var(--line); background: #fff; margin-top: 40px; }
.footer-in { display: flex; align-items: flex-start; justify-content: space-between; padding: 34px 0 30px; gap: 30px; flex-wrap: wrap; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.footer-logo img { width: 30px; height: 30px; }
.footer-note { font-size: 12.5px; color: var(--ink-3); max-width: 560px; margin-top: 10px; }
.footer-nav { display: flex; gap: 20px; font-size: 13.5px; }
.footer-nav a { color: var(--ink-2); }
.footer-nav a:hover { color: var(--orange-deep); }
.footer-base { border-top: 1px solid var(--line); padding: 14px 0; font-size: 12px; color: #a39b8d; text-align: center; }

/* toast */
.dl-toast { position: fixed; left: 50%; top: 18%; transform: translateX(-50%) translateY(-8px); background: rgba(38,35,30,.9); color: #fff; padding: 10px 22px; border-radius: 20px; font-size: 14px; opacity: 0; transition: all .3s; z-index: 999; pointer-events: none; }
.dl-toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* modal + breathing halo */
.dl-mask { position: fixed; inset: 0; background: rgba(30,26,20,.55); z-index: 200; display: none; align-items: center; justify-content: center; padding: 20px; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .22s, visibility .22s; }
.dl-mask.show { opacity: 1; visibility: visible; pointer-events: auto; }
.dl-modal { background: #fff; border-radius: 18px; max-width: 460px; width: 100%; padding: 30px 32px; position: relative; transform: translateY(14px) scale(.97); transition: transform .25s; }
.dl-mask.show .dl-modal { transform: none; }
.dl-close { position: absolute; right: 16px; top: 12px; background: none; border: none; font-size: 26px; color: var(--ink-3); cursor: pointer; line-height: 1; }
.dl-close:hover { color: var(--ink); }
.dl-modal-head { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.dl-modal-head img { width: 40px; height: 40px; }
.dl-modal-head h3 { font-size: 18px; }
.dl-sub { font-size: 12.5px; color: var(--ink-3); }
.dl-modal-body { display: flex; gap: 24px; align-items: flex-start; }
.qr-halo {
  width: 174px; height: 174px; flex: 0 0 174px; align-self: flex-start;
  box-sizing: border-box; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 14px; padding: 10px; background: #fff;
  animation: haloBreath 2.8s ease-in-out infinite;
}
.qr-halo img { width: 150px; height: 150px; max-width: 100%; border-radius: 8px; object-fit: contain; display: block; }
@keyframes haloBreath {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,90,31,.38); transform: scale(1); }
  50% { box-shadow: 0 0 0 7px rgba(255,90,31,0); transform: scale(1.03); }
}
.dl-modal-txt ul { list-style: none; }
.dl-modal-txt li { font-size: 13.5px; color: var(--ink-2); padding: 6px 0 6px 24px; position: relative; }
.dl-modal-txt li::before { content: "✓"; position: absolute; left: 2px; color: var(--ok); font-weight: 700; }
.dl-scan-tip { margin-top: 12px; font-size: 13px; color: var(--orange-deep); font-weight: 600; }

/* gallery / showcase */
.showcase { display: flex; flex-direction: column; gap: 18px; }
.shot { position: relative; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #fff; box-shadow: 0 8px 22px rgba(60,40,20,.06); transition: box-shadow .25s, transform .25s; }
.shot:hover { box-shadow: 0 16px 36px rgba(60,40,20,.13); transform: translateY(-2px); }
.shot img { width: 100%; display: block; }
.shot-img { overflow: hidden; background: #f7f4ee; }
.shot-cap { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--line); background: #fff; }
.shot-cap .cap-tag { flex: 0 0 auto; font-size: 11px; font-weight: 700; letter-spacing: .5px; color: var(--orange-deep); background: var(--orange-soft); border-radius: 5px; padding: 3px 8px; }
.shot-cap h4 { font-size: 14.5px; font-weight: 600; }
.shot-cap p { font-size: 12.5px; color: var(--ink-3); margin-top: 1px; }
.shot-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.shot-duo .shot { display: flex; flex-direction: column; }
.shot-duo .shot-img { aspect-ratio: 5 / 3; }
.shot-duo .shot-img img { height: 100%; object-fit: cover; }
.shot-duo .shot-cap { border-top: 1px solid var(--line); }
.showcase-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.strip-item { border: 1px solid var(--line); border-radius: 13px; overflow: hidden; background: #fff; display: flex; flex-direction: column; transition: box-shadow .25s, transform .25s; }
.strip-item:hover { box-shadow: 0 12px 28px rgba(60,40,20,.11); transform: translateY(-2px); }
.strip-item .si-img { aspect-ratio: 16 / 9; overflow: hidden; background: #f7f4ee; }
.strip-item .si-img img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.strip-item .shot-cap { border-top: 1px solid var(--line); }
.compare { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: 14px; }
.compare th, .compare td { padding: 11px 16px; border-bottom: 1px solid var(--line); text-align: center; }
.compare th { background: #f6f2ea; font-size: 13px; }
.compare td:first-child { text-align: left; color: var(--ink-2); }
.compare .yes { color: var(--ok); font-weight: 700; }
.compare .no { color: #c9c2b6; }

/* responsive */
@media (max-width: 960px) {
  .hero-in, .frow, .g3, .users, .steps { grid-template-columns: 1fr; }
  .frow.rev .frow-txt { order: 0; }
  .quickbar-in { grid-template-columns: repeat(2, 1fr); }
  .qb { border-left: none; padding: 8px 0; }
  .dl-cards, .g2 { grid-template-columns: 1fr; }
  .doc { grid-template-columns: 1fr; }
  .toc { position: static; display: none; }
  .showcase { gap: 14px; }
  .shot-duo, .showcase-strip { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero h1 { font-size: 29px; }
  .dl-modal-body { flex-direction: column; align-items: center; text-align: left; }
  .header-cta { display: inline-flex; }
}