/* VidClean 站点样式:暖棕橙色板同 App(docs/design/optimization-2026-10-02/02-视觉方向v2.md §2),胶片带 + 错开的一格是签名元素。
   零依赖:系统字体栈,无外链。深浅色跟随系统。 */
:root {
  color-scheme: light dark;
  --page: #FAF7F2; --sheet: #FFFFFF; --tray: #F3EDE4; --ink: #1F1A16; --dim: #6B625A;
  --ember: #B5460A; --ember-wash: #FCEBDC; --btn-a: #C4510D; --btn-b: #A63C06; --on-ember: #FFFFFF;
  --green: #1F7A5C; --green-wash: #E3F3EC; --red: #B3261E; --red-wash: #FBE9E7;
  --hair: #D9D0C4; --outline: #8A8178;
  --card-a: #44301F; --card-b: #2A1D15; --card-ink: #FFF3E6; --card-dim: #D9C5B2;
  --film: #120D0A; --hole: #6E625A; --frame: #FFF3E6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #14110E; --sheet: #1F1A16; --tray: #2A231D; --ink: #F3EBE2; --dim: #B3A89C;
    --ember: #FF9A5C; --ember-wash: #3A2717; --btn-a: #FFA46A; --btn-b: #F28B4A; --on-ember: #2A1204;
    --green: #7FD1AE; --green-wash: #1B2E27; --red: #FFB4A9; --red-wash: #3A1F1C;
    --hair: #4A4036; --outline: #8F8478;
    --card-a: #4A2F1D; --card-b: #33241A;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--page); color: var(--ink); overflow-wrap: anywhere;
  font: 400 1rem/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ember); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--ember); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: 12px; top: -64px; z-index: 10; background: var(--ink); color: var(--page); padding: 10px 16px; border-radius: 8px; }
.skip:focus { top: 12px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* 顶栏 */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.brand img { width: 34px; height: 34px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; padding: 8px 12px; border-radius: 999px; font-weight: 600; font-size: .95rem; min-height: 40px; display: inline-flex; align-items: center; }
.nav a:hover, .nav a[aria-current="page"] { background: var(--ember-wash); color: var(--ember); }

/* 胶片孔带:装饰,孔距同 App 存储条 */
.perf { height: 14px; position: relative; }
.perf::before { content: ""; position: absolute; inset: 4px 0; background: repeating-linear-gradient(90deg, var(--hole) 0 7px, transparent 7px 14px); border-radius: 2px; opacity: .55; }
.card .perf { position: absolute; left: 0; right: 0; }
.card .perf.t { top: 6px; } .card .perf.b { bottom: 6px; }

/* 首屏:对应 App 首页的深棕主卡 */
.card { position: relative; background: linear-gradient(160deg, var(--card-a), var(--card-b)); color: var(--card-ink); border-radius: 28px; padding: 48px 28px; margin-top: 8px; overflow: hidden; }
.card::after { content: ""; position: absolute; top: -90px; right: -90px; width: 360px; height: 360px; background: radial-gradient(closest-side, rgba(255,138,61,.26), transparent); pointer-events: none; }
.hero { display: grid; gap: 32px; align-items: center; position: relative; z-index: 1; }
.eyebrow { margin: 0 0 8px; color: var(--card-dim); font-weight: 600; letter-spacing: .02em; }
h1 { margin: 0 0 14px; font-size: clamp(1.8rem, 6vw, 2.8rem); line-height: 1.15; font-weight: 700; letter-spacing: -.01em; }
.lead { margin: 0 0 22px; font-size: 1.1rem; color: var(--card-dim); max-width: 34em; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 14px; font-weight: 700; text-decoration: none; font-size: 1rem; }
.btn.play { background: linear-gradient(180deg, var(--btn-a), var(--btn-b)); color: var(--on-ember); }
.btn.play:hover { filter: brightness(1.06); }
.btn.play.soon { background: none; color: var(--card-ink); box-shadow: inset 0 0 0 2px rgba(255,243,230,.45); cursor: default; }
.btn.ghost { color: var(--card-ink); box-shadow: inset 0 0 0 2px rgba(255,243,230,.45); }
.btn.ghost:hover { background: rgba(255,243,230,.1); }
.card :focus-visible { outline-color: #FFD2AE; }
.small { font-size: .875rem; }
.card .small { color: var(--card-dim); margin: 14px 0 0; }
.pill-note { margin: 18px 0 0; padding: 12px 14px; border-radius: 12px; background: rgba(255,243,230,.1); box-shadow: inset 0 0 0 1px rgba(255,243,230,.28); color: var(--card-ink); font-size: .95rem; }

/* 胶片:三格,中间一格剪下、错开、上移 */
.strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; background: var(--film); padding: 18px 8px; border-radius: 14px; position: relative; max-width: 460px; margin: 0 auto; width: 100%; }
.strip::before, .strip::after { content: ""; position: absolute; left: 8px; right: 8px; height: 6px; background: repeating-linear-gradient(90deg, var(--hole) 0 6px, transparent 6px 11px); opacity: .8; }
.strip::before { top: 6px; } .strip::after { bottom: 6px; }
.strip figure { margin: 0; border-radius: 8px; overflow: hidden; background: var(--frame); }
.strip figure.cut { transform: translateY(-14px); box-shadow: 0 0 0 3px #E0600F, 0 10px 22px rgba(0,0,0,.4); }

/* 版块 */
section { padding: 52px 0 8px; }
h2 { font-size: clamp(1.4rem, 4vw, 1.8rem); line-height: 1.25; margin: 0 0 8px; }
.sub { color: var(--dim); margin: 0 0 24px; max-width: 40em; }
.grid { display: grid; gap: 16px; }
.feat { background: var(--sheet); border: 1px solid var(--hair); border-radius: 20px; padding: 22px; }
.feat h3 { margin: 12px 0 6px; font-size: 1.15rem; }
.feat p { margin: 0 0 8px; color: var(--ink); }
.feat ul { margin: 6px 0 0; padding-left: 1.2rem; }
.feat li { margin: 4px 0; }
.num { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 34px; border-radius: 9px; background: var(--frame); color: #2A1D15; font-weight: 700; box-shadow: inset 0 0 0 1px rgba(0,0,0,.18); }
.feat.cutout { border-color: #E0600F; box-shadow: 0 -6px 0 0 var(--ember-wash); }
.feat.cutout .num { background: #E0600F; color: #1F1206; }

/* 回收站规则表 */
.rules { display: grid; gap: 12px; }
.rule { border-radius: 16px; padding: 16px 18px; border: 1px solid var(--hair); background: var(--sheet); }
.rule b { display: block; margin-bottom: 4px; }
.rule.ok { background: var(--green-wash); border-color: transparent; } .rule.ok b { color: var(--green); }
.rule.gone { background: var(--red-wash); border-color: transparent; } .rule.gone b { color: var(--red); }

/* 截图 */
.shots { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.shots figure { margin: 0; }
.shots img { border-radius: 14px; border: 1px solid var(--hair); background: var(--tray); }
.shots figcaption { margin-top: 8px; color: var(--dim); font-size: .9rem; }

/* 怎么用:三步 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.step { background: var(--sheet); border: 1px solid var(--hair); border-radius: 20px; padding: 22px; display: flex; flex-direction: column; }
.step figure { margin: 0 0 16px; background: var(--tray); border-radius: 14px; padding: 10px; }
.step figure img { width: 100%; max-width: 230px; margin: 0 auto; border-radius: 10px; }
.step h3 { margin: 12px 0 6px; font-size: 1.15rem; }
.step p { margin: 0; }
.step .num { align-self: flex-start; }
.step.cutout { border-color: #E0600F; box-shadow: 0 -6px 0 0 var(--ember-wash); }
.step.cutout .num { background: #E0600F; color: #1F1206; }
.grid.three { grid-template-columns: 1fr; }
.mt { margin-top: 28px; }
h3.mt { font-size: 1.15rem; margin-bottom: 12px; }

/* 标签行 */
.tag-h { margin: 16px 0 6px !important; color: var(--dim) !important; font-size: .85rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.feat ul.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { margin: 0; padding: 4px 12px; border-radius: 999px; background: var(--tray); border: 1px solid var(--hair); font-size: .9rem; }
.tags.alt li { background: var(--ember-wash); border-color: transparent; color: var(--ink); }

/* Android 版本对比:醒目 */
.versions { display: grid; gap: 12px; margin-bottom: 14px; grid-template-columns: 1fr; }
.ver { border-radius: 20px; padding: 20px 22px; display: flex; flex-direction: column; gap: 4px; }
.ver-k { font-weight: 700; font-size: .95rem; }
.ver-v { font-weight: 700; font-size: clamp(1.25rem, 4.5vw, 1.6rem); line-height: 1.25; color: var(--ink); }
.ver.ok { background: var(--green-wash); } .ver.ok .ver-k { color: var(--green); }
.ver.gone { background: var(--red-wash); } .ver.gone .ver-k { color: var(--red); }

/* 权限时间线 */
.timeline { list-style: none; counter-reset: t; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: 1fr; }
.timeline li { counter-increment: t; position: relative; background: var(--sheet); border: 1px solid var(--hair); border-radius: 16px; padding: 14px 16px 14px 60px; }
.timeline li::before { content: counter(t); position: absolute; left: 14px; top: 14px; width: 32px; height: 32px; border-radius: 50%; background: var(--ember-wash); color: var(--ember); font-weight: 700; display: flex; align-items: center; justify-content: center; }

/* 语言 */
.langs p { margin: 0; font-size: 1.1rem; line-height: 1.8; }

/* 截图画廊:纯 CSS 横向滑动 */
.gallery { display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 2px 16px; margin: 0 -2px; }
.gallery figure { flex: 0 0 min(62%, 240px); margin: 0; scroll-snap-align: start; }
.gallery img { border-radius: 14px; border: 1px solid var(--hair); background: var(--tray); }
.gallery figcaption { margin-top: 8px; color: var(--dim); font-size: .9rem; }

/* 结尾号召 */
.band { margin-top: 56px; padding: 36px 24px !important; border-radius: 28px; text-align: center; background: linear-gradient(160deg, var(--card-a), var(--card-b)); color: var(--card-ink); }
.band h2 { margin-bottom: 6px; }
.band p { margin: 0 0 20px; color: var(--card-dim); }
.band .btn.play.soon { color: var(--card-ink); }

/* 长文页(隐私 / 支持) */
.doc { padding-top: 36px; padding-bottom: 24px; }
.doc h1 { color: var(--ink); font-size: clamp(1.6rem, 5vw, 2.2rem); }
.doc h2 { margin: 34px 0 8px; font-size: 1.25rem; }
.doc p, .doc li { max-width: 46em; }
.doc ul { padding-left: 1.3rem; }
.doc li { margin: 6px 0; }
.doc code { background: var(--tray); padding: 1px 6px; border-radius: 5px; font-size: .92em; }
.doc .lead { color: var(--ink); background: var(--sheet); border: 1px solid var(--hair); border-radius: 14px; padding: 16px; margin: 0 0 8px; }
.updated { color: var(--dim); margin-top: 40px; border-top: 1px solid var(--hair); padding-top: 16px; }
.muted { color: var(--dim); }
details { background: var(--sheet); border: 1px solid var(--hair); border-radius: 14px; margin: 10px 0; }
summary { cursor: pointer; padding: 14px 16px; font-weight: 700; list-style-position: inside; min-height: 48px; }
details[open] summary { border-bottom: 1px solid var(--hair); }
details .body { padding: 6px 16px 14px; }
details .body p, details .body li { max-width: 44em; }
.note { background: var(--ember-wash); border-radius: 12px; padding: 12px 14px; }

/* 页脚 */
footer { margin-top: 56px; padding: 0 0 36px; color: var(--dim); font-size: .92rem; }
footer .cols { display: grid; gap: 14px; padding-top: 22px; }
footer a { color: var(--ink); }
footer p { margin: 0 0 6px; }

@media (min-width: 720px) {
  .card { padding: 64px 48px; border-radius: 36px; }
  .hero { grid-template-columns: 1.05fr .95fr; }
  .grid.two { grid-template-columns: repeat(2, 1fr); }
  .grid.three { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .versions { grid-template-columns: 1fr 1fr; }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .rules { grid-template-columns: repeat(3, 1fr); }
  .shots { grid-template-columns: repeat(4, 1fr); }
  footer .cols { grid-template-columns: 1.4fr 1fr; }
}
@media (min-width: 720px) { .gallery figure { flex: 0 0 200px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }