/* PcPhoneTransfer 官网样式表
   纯手写，无外部依赖（不引用任何 CDN / 字体服务） */

:root {
  --bg: #080D18;
  --bg-soft: #0C1424;
  --panel: #101B2E;
  --panel-2: #14213A;
  --line: rgba(120, 160, 220, 0.14);
  --line-strong: rgba(120, 160, 220, 0.26);
  --text: #E9F0FA;
  --muted: #8FA3BF;
  --muted-2: #6B7F9C;
  --accent: #3B9EFF;
  --accent-2: #1D6FE0;
  --accent-soft: rgba(59, 158, 255, 0.12);
  --ok: #34D399;
  --radius: 16px;
  --maxw: 1140px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #6FB9FF; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: rgba(8, 13, 24, 0.78);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  height: 64px; display: flex; align-items: center; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.2px; }
.brand img { width: 26px; height: 26px; border-radius: 7px; }
.brand span { font-size: 16px; color: var(--text); }
.brand .tld { color: var(--muted-2); font-weight: 500; }

.nav-links { display: flex; gap: 24px; margin-left: auto; }
.nav-links a { color: var(--muted); font-size: 14.5px; }
.nav-links a:hover { color: var(--text); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: 10px; font-size: 14px; font-weight: 600;
  color: #fff; background: linear-gradient(180deg, #4AA6FF, var(--accent-2));
  box-shadow: 0 6px 18px rgba(29, 111, 224, 0.32);
  border: 1px solid rgba(120, 180, 255, 0.35);
}
.nav-cta:hover { color: #fff; filter: brightness(1.06); }

.menu-btn { display: none; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 84px 0 64px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto -10%; height: 620px;
  background:
    radial-gradient(closest-side at 28% 32%, rgba(59, 158, 255, 0.20), transparent 70%),
    radial-gradient(closest-side at 74% 12%, rgba(80, 200, 255, 0.13), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(120, 160, 220, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120, 160, 220, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(closest-side at 50% 30%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(closest-side at 50% 30%, #000 30%, transparent 78%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }

.hero-grid {
  display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 56px; align-items: center;
}

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 8px; margin-bottom: 22px;
  border: 1px solid var(--line-strong); border-radius: 999px;
  background: rgba(20, 33, 58, 0.7);
  font-size: 13px; color: var(--muted);
}
.pill b { color: var(--text); font-weight: 600; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.16); }

h1 {
  margin: 0 0 20px; font-size: clamp(34px, 4.4vw, 54px); line-height: 1.16;
  letter-spacing: -1.2px; font-weight: 800;
}
h1 .grad {
  background: linear-gradient(96deg, #6FC0FF 8%, #3B9EFF 46%, #8E7BFF 96%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  /* 速度区间不折行：一旦断在「30–130」和「MB/s」之间，观感会碎掉 */
  white-space: nowrap;
}

.lede { margin: 0 0 30px; font-size: 17.5px; color: var(--muted); max-width: 540px; }
.lede strong { color: var(--text); font-weight: 600; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  height: 48px; padding: 0 22px; border-radius: 12px;
  font-size: 15.5px; font-weight: 600; border: 1px solid transparent;
  transition: transform .14s ease, filter .14s ease, background .14s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  color: #fff; background: linear-gradient(180deg, #4AA6FF, var(--accent-2));
  box-shadow: 0 10px 26px rgba(29, 111, 224, 0.34), inset 0 1px 0 rgba(255,255,255,.24);
}
.btn-primary:hover { color: #fff; filter: brightness(1.07); }
.btn-ghost {
  color: var(--text); background: rgba(20, 33, 58, 0.7);
  border-color: var(--line-strong);
}
.btn-ghost:hover { color: var(--text); background: rgba(28, 44, 74, 0.85); }
.btn small { font-weight: 500; color: rgba(255,255,255,.66); font-size: 12.5px; }
.btn-ghost small { color: var(--muted-2); }

.platforms { margin-top: 20px; font-size: 13px; color: var(--muted-2); display: flex; gap: 16px; flex-wrap: wrap; }
.platforms span { display: inline-flex; align-items: center; gap: 6px; }
.platforms svg { opacity: .8; }

/* ---------- Hero 视觉（纯 CSS 界面示意） ---------- */
.mock { display: flex; align-items: flex-end; gap: 14px; }
.window {
  border-radius: 14px; overflow: hidden;
  background: linear-gradient(180deg, #13203A, #0E1729);
  border: 1px solid var(--line-strong);
  box-shadow: 0 34px 80px rgba(3, 8, 20, 0.72), inset 0 1px 0 rgba(255,255,255,.05);
}
.win-bar {
  height: 38px; display: flex; align-items: center; gap: 7px; padding: 0 14px;
  background: rgba(9, 15, 27, 0.9); border-bottom: 1px solid var(--line);
}
.win-bar i { width: 10px; height: 10px; border-radius: 50%; display: block; }
.win-bar i:nth-child(1) { background: #FF5F57; }
.win-bar i:nth-child(2) { background: #FEBC2E; }
.win-bar i:nth-child(3) { background: #28C840; }
.win-bar .title { margin-left: 10px; font-size: 12px; color: var(--muted-2); }

.win-body { display: grid; grid-template-columns: 150px 1fr; min-height: 268px; }
.side { border-right: 1px solid var(--line); padding: 14px 10px; }
.side .dev {
  display: flex; align-items: center; gap: 8px; padding: 8px 9px; border-radius: 9px;
  font-size: 12.5px; color: var(--muted);
}
.side .dev.on { background: var(--accent-soft); color: #BFDCFF; border: 1px solid rgba(59,158,255,.26); }
.side .dev .led { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px rgba(52,211,153,.8); }
.side .sep { height: 1px; background: var(--line); margin: 10px 4px; }
.side .lnk { padding: 6px 9px; font-size: 12.5px; color: var(--muted-2); }

.files { padding: 12px 14px; }
.files .row {
  display: grid; grid-template-columns: 18px 1fr 74px; gap: 10px; align-items: center;
  padding: 9px 10px; border-radius: 9px; font-size: 12.5px; color: var(--muted);
}
.files .row:nth-child(odd) { background: rgba(255,255,255,0.018); }
.files .row .nm { color: #C7D6EA; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.files .row .sz { text-align: right; color: var(--muted-2); font-variant-numeric: tabular-nums; }
.fi { width: 15px; height: 15px; border-radius: 4px; background: rgba(59,158,255,.22); border: 1px solid rgba(59,158,255,.45); }

.prog { padding: 12px 14px 16px; border-top: 1px solid var(--line); background: rgba(9,15,27,.55); }
.prog .top { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.prog .top b { color: var(--text); font-weight: 600; }
.bar { height: 6px; border-radius: 99px; background: rgba(120,160,220,.16); overflow: hidden; }
.bar i { display: block; height: 100%; width: 68%; border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), #7FD1FF);
  box-shadow: 0 0 14px rgba(59,158,255,.6); }

/* 手机小图 */
.window { flex: 1 1 auto; min-width: 0; }
.phone {
  flex: 0 0 96px; width: 96px; height: 196px;
  border-radius: 20px; padding: 5px;
  background: linear-gradient(180deg, #23334F, #131E33);
  border: 1px solid var(--line-strong);
  box-shadow: 0 26px 56px rgba(3, 8, 20, 0.78);
}
.phone .screen {
  height: 100%; border-radius: 18px; background: linear-gradient(180deg, #0F1B30, #0A1322);
  border: 1px solid rgba(120,160,220,.12); padding: 12px 10px; overflow: hidden;
}
.phone .notch { width: 42px; height: 4px; border-radius: 99px; background: rgba(255,255,255,.16); margin: 0 auto 12px; }
.phone .app { display: flex; align-items: center; gap: 6px; font-size: 9.5px; color: #BFD4EC; margin-bottom: 10px; }
.phone .app img { width: 14px; height: 14px; border-radius: 4px; }
.phone .item { display: flex; gap: 6px; align-items: center; padding: 6px; border-radius: 7px; background: rgba(255,255,255,.03); margin-bottom: 6px; }
.phone .item .bx { width: 16px; height: 16px; border-radius: 4px; background: rgba(59,158,255,.18); border: 1px solid rgba(59,158,255,.4); }
.phone .item .tx { flex: 1; }
.phone .item .tx i { display: block; height: 3px; border-radius: 2px; background: rgba(160,190,225,.35); }
.phone .item .tx i + i { width: 60%; margin-top: 4px; background: rgba(160,190,225,.2); }

/* ---------- 通用 section ---------- */
section { padding: 72px 0; }
.sec-head { max-width: 720px; margin-bottom: 40px; }
.sec-head .kicker {
  font-size: 13px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
h2 { margin: 0 0 14px; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.3; letter-spacing: -0.6px; font-weight: 750; }
.sec-head p { margin: 0; color: var(--muted); font-size: 16px; }

/* 三卖点 */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  padding: 26px 24px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20,33,58,.72), rgba(12,20,36,.72));
  border: 1px solid var(--line);
}
.card:hover { border-color: var(--line-strong); }
.card .ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: var(--accent-soft); border: 1px solid rgba(59,158,255,.28); margin-bottom: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; letter-spacing: -0.2px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.72; }

/* 功能网格 */
.grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feat { padding: 22px; border-radius: 14px; border: 1px solid var(--line); background: rgba(16,27,46,.55); }
.feat h4 { margin: 0 0 6px; font-size: 15.5px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.feat h4 svg { color: var(--accent); flex: none; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; }

/* 下载区 */
.download { background: linear-gradient(180deg, rgba(12,20,36,0), rgba(12,20,36,.85)); border-top: 1px solid var(--line); }
.dl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.dl {
  display: flex; flex-direction: column; gap: 14px;
  padding: 26px 24px; border-radius: var(--radius); position: relative; overflow: hidden;
  background: linear-gradient(180deg, rgba(22,36,62,.86), rgba(12,20,36,.9));
  border: 1px solid var(--line-strong);
}
.dl.mac { box-shadow: 0 18px 50px rgba(29,111,224,.16); }
.dl .top { display: flex; align-items: center; gap: 12px; }
.dl .top .name { font-size: 16px; font-weight: 700; }
.dl .top .sub { font-size: 12.5px; color: var(--muted-2); }
.dl .os { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 9px;
  background: rgba(255,255,255,.05); border: 1px solid var(--line); flex: none; }
.dl .meta { font-size: 12.5px; color: var(--muted-2); display: flex; flex-direction: column; gap: 4px; }
.dl .meta code { font-family: var(--mono); font-size: 11.5px; color: #9FB6D4; word-break: break-all; }
.dl a.btn { width: 100%; justify-content: center; height: 44px;   margin-top: auto;
}
.dl .soon {
  width: 100%; height: 44px; display: flex; align-items: center; justify-content: center;
  border-radius: 12px; font-size: 14.5px; font-weight: 600; color: var(--muted-2);
  background: rgba(255,255,255,.03); border: 1px dashed var(--line-strong);
  margin-top: auto;
}

/* 系统要求表 */
table.req { width: 100%; border-collapse: collapse; font-size: 14.5px; overflow: hidden; border-radius: 12px; }
table.req th, table.req td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); }
table.req th { color: var(--muted-2); font-weight: 600; font-size: 13px; background: rgba(16,27,46,.6); }
table.req td { color: var(--muted); }
table.req td:first-child { color: var(--text); font-weight: 600; width: 150px; }
table.req tr:last-child td { border-bottom: 0; }

/* 隐私条 */
.privacy-band {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center;
  padding: 34px 34px; border-radius: 20px;
  background:
    radial-gradient(closest-side at 12% 0%, rgba(52,211,153,.12), transparent 70%),
    linear-gradient(180deg, rgba(20,33,58,.8), rgba(12,20,36,.8));
  border: 1px solid var(--line-strong);
}
.privacy-band h3 { margin: 0 0 10px; font-size: 21px; letter-spacing: -0.3px; }
.privacy-band p { margin: 0; color: var(--muted); font-size: 15px; }
.privacy-list { display: grid; gap: 10px; }
.privacy-list div { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--muted); }
.privacy-list svg { color: var(--ok); flex: none; margin-top: 3px; }
.privacy-list b { color: var(--text); font-weight: 600; }

/* FAQ */
.faq { max-width: 860px; }
details {
  border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin-bottom: 10px;
  background: rgba(16,27,46,.5);
}
details[open] { border-color: var(--line-strong); background: rgba(20,33,58,.6); }
summary {
  cursor: pointer; padding: 16px 0; font-weight: 650; font-size: 15.5px; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 20px; font-weight: 400; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { margin: 0 0 18px; color: var(--muted); font-size: 14.5px; }

/* 页脚 */
footer { border-top: 1px solid var(--line); padding: 44px 0 40px; background: var(--bg-soft); }
.foot { display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; align-items: flex-start; }
.foot .brand { margin-bottom: 10px; }
.foot p { margin: 0; color: var(--muted-2); font-size: 13px; }
.foot-links { display: flex; gap: 26px; flex-wrap: wrap; font-size: 13.5px; }
.foot-links a { color: var(--muted); }
.foot-bottom {
  margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line);
  display: flex; flex-wrap: nowrap; gap: 12px 26px; justify-content: space-between;
  align-items: center;
  font-size: 12.5px; color: var(--muted-2);
}
.foot-bottom > span { white-space: nowrap; }

/* ---------- 文档页（隐私/条款） ---------- */
.doc { padding: 56px 0 80px; }
.doc .wrap { max-width: 820px; }
.doc h1 { font-size: 32px; margin-bottom: 8px; letter-spacing: -0.8px; }
.doc .updated { color: var(--muted-2); font-size: 13.5px; margin-bottom: 34px; }
.doc h2 { font-size: 20px; margin: 34px 0 10px; }
.doc p, .doc li { color: var(--muted); font-size: 15px; }
.doc ul { padding-left: 22px; }
.doc li { margin-bottom: 8px; }
.doc .note {
  padding: 16px 18px; border-radius: 12px; border: 1px solid var(--line-strong);
  background: rgba(20,33,58,.55); font-size: 14px; color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding-top: 56px; }
  .pillars, .grid-6, .dl-grid { grid-template-columns: 1fr 1fr; }
  .privacy-band { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 680px) {
  .pillars, .grid-6, .dl-grid { grid-template-columns: 1fr; }
  .win-body { grid-template-columns: 1fr; }
  .side { display: none; }
  section { padding: 56px 0; }
  .phone { width: 84px; height: 176px; }
  .window { min-width: 0; }
  .win-bar .title { display: none; }
  .nav-inner { gap: 14px; }
  .nav-cta { padding: 7px 12px; font-size: 13px; }
  table.req td:first-child { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ---------- 性能数据条 ---------- */
.perf {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(13,22,39,.9), rgba(9,15,27,.9));
}
.perf-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.perf-item { padding: 26px 24px 24px; border-right: 1px solid var(--line); }
.perf-item:last-child { border-right: 0; }
.perf-item .num {
  font-size: 30px; font-weight: 800; letter-spacing: -1.2px; line-height: 1.1;
  background: linear-gradient(96deg, #7AC6FF, #3B9EFF 60%, #9B8CFF);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.perf-item .num small { font-size: 15px; font-weight: 700; letter-spacing: 0; }
.perf-item .lb { margin-top: 6px; font-size: 13px; color: var(--muted-2); }

@media (max-width: 980px) {
  .perf-grid { grid-template-columns: repeat(2, 1fr); }
  .perf-item:nth-child(2) { border-right: 0; }
  .perf-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 680px) {
  .dl-grid { grid-template-columns: 1fr !important; }
  .perf-item { padding: 20px 18px; }
  .perf-item .num { font-size: 25px; }
}

/* 页脚备案信息：窄屏允许折行，避免溢出 */
@media (max-width: 680px) {
  .foot-bottom { flex-wrap: wrap; }
  .foot-bottom > span { white-space: normal; }
}