/* 歌者映画收货管理系统官网：纯静态，不引用外部字体和 CDN */

:root {
  --paper: #f7f7f4;
  --surface: #fff;
  --ink: #0b1426;
  --text: #232b39;
  --text-2: #5a6373;
  --muted: #8b919c;
  --line: rgba(11, 20, 38, .09);
  --line-strong: rgba(11, 20, 38, .16);
  --accent: #1d5bd8;
  --accent-soft: #e9effb;
  --red: #c2362b;
  --dark-text: #a3adc0;
  --dark-line: rgba(255, 255, 255, .1);

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Roboto Mono", ui-monospace, Menlo, Consolas, monospace;

  --wrap: 1200px;
  --gutter: 32px;
  --header: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --shadow-window:
    0 1px 1px rgba(11, 20, 38, .04),
    0 10px 20px -10px rgba(11, 20, 38, .14),
    0 40px 80px -30px rgba(11, 20, 38, .3);

  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; -webkit-user-drag: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
b { font-weight: 600; }
h1, h2, h3 { color: var(--ink); font-weight: 700; letter-spacing: -.01em; text-wrap: balance; }
p, dd, li, figcaption { text-wrap: pretty; }
code {
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(11, 20, 38, .05);
  color: var(--ink);
  font-family: var(--mono);
  font-size: .86em;
  letter-spacing: 0;
}
::selection { background: #cfdcf7; color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap {
  max-width: calc(var(--wrap) + var(--gutter) * 2);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}
.skip-link:focus { top: 12px; }

.kicker {
  margin-bottom: 14px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .02em;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .2s, transform .2s var(--ease), box-shadow .2s;
}
.btn:hover { background: var(--accent); box-shadow: 0 8px 20px -8px rgba(29, 91, 216, .55); }
.btn:active { transform: translateY(1px); }
.btn-small { height: 36px; padding: 0 14px; border-radius: 8px; font-size: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}
.link-arrow span { transition: transform .25s var(--ease); }
.link-arrow:hover span { transform: translateX(4px); }

/* 顶部 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.site-header.is-scrolled {
  background: rgba(247, 247, 244, .84);
  border-bottom-color: var(--line);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
}
.site-header.on-dark {
  background: rgba(11, 20, 38, .82);
  border-bottom-color: rgba(255, 255, 255, .08);
}
.site-header.on-dark .logo, .site-header.on-dark .nav a:hover, .site-header.on-dark .nav a[aria-current="true"] { color: #fff; }
.site-header.on-dark .nav a { color: var(--dark-text); }
.site-header.on-dark .nav a::after { background: #fff; }
.site-header.on-dark .btn { background: #fff; color: var(--ink); }
.site-header.on-dark .btn:hover { background: var(--accent); color: #fff; }
.site-header.on-dark .nav-toggle span { background: #fff; }
.site-header, .site-header .logo, .site-header .nav a, .site-header .btn { transition: background .3s, border-color .3s, color .3s, box-shadow .2s; }
.header-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  height: var(--header);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
}
.logo img { border-radius: 7px; }
.logo small { margin-left: 6px; color: var(--text-2); font-size: 14px; font-weight: 500; letter-spacing: 0; }
.site-header.on-dark .logo small { color: var(--dark-text); }
.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a {
  position: relative;
  padding: 4px 0;
  color: var(--text-2);
  font-size: 14.5px;
  transition: color .2s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1.5px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover, .nav a[aria-current="true"] { color: var(--ink); }
.nav a:hover::after, .nav a[aria-current="true"]::after { transform: scaleX(1); }
.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border: 0;
  background: none;
  cursor: pointer;
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.nav-toggle span:first-child { top: 16px; }
.nav-toggle span:last-child { top: 23px; }
.nav-open .nav-toggle span:first-child { top: 19.5px; transform: rotate(45deg); }
.nav-open .nav-toggle span:last-child { top: 19.5px; transform: rotate(-45deg); }

/* 截图外框 */
.window {
  overflow: hidden;
  border: 1px solid rgba(11, 20, 38, .08);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-window);
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: #f2f2ef;
}
.window-bar i { width: 9px; height: 9px; border-radius: 50%; background: #d8d8d2; }
.window-bar span {
  margin-left: 10px;
  overflow: hidden;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.device {
  padding: 7px;
  border-radius: 34px;
  background: #10141b;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), var(--shadow-window);
}
.device img { border-radius: 27px; }
.zoom {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}

/* 区块标题：左标题右说明 */
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: end;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line-strong);
}
.section-head h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.18; }
.section-head > p { color: var(--text-2); font-size: 16px; }

/* 首屏 */
.hero { padding: 88px 0 120px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 64px;
  align-items: end;
}
.hero-title {
  font-size: clamp(40px, 6.2vw, 78px);
  line-height: 1.1;
  letter-spacing: -.025em;
}
.hero-title .line { display: block; }
.mark { position: relative; display: inline-block; }
.mark svg {
  position: absolute;
  left: -2%;
  bottom: -.06em;
  width: 104%;
  height: .22em;
  overflow: visible;
}
.mark path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 4.5;
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 0;
}
.hero-lead { max-width: 34em; margin-top: 28px; color: var(--text-2); font-size: 18px; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }

.ledger { border-top: 1.5px solid var(--ink); }
.ledger div {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
}
.ledger dt { color: var(--muted); font-family: var(--mono); font-size: 12px; line-height: 1.95; }
.ledger dd { color: var(--ink); }

.hero-stage {
  position: relative;
  margin-top: 80px;
  perspective: 2200px;
}
.hero-stage .window {
  transform-origin: 50% 0;
  transform: rotateX(var(--tilt, 0deg)) scale(var(--scale, 1));
  will-change: transform;
}
.hero-phone {
  position: absolute;
  right: -20px;
  bottom: -64px;
  width: 252px;
  transform: translateY(var(--float, 0px));
  will-change: transform;
}
.footnote { margin-top: 96px; color: var(--muted); font-size: 13px; }

/* 首屏入场 */
.js .hero [style*="--i"] {
  animation: rise 1s var(--ease) both;
  animation-delay: calc(var(--i) * 90ms + 60ms);
}
.js .hero-title .line {
  animation: line-in 1.1s var(--ease) both;
  animation-delay: calc(var(--i) * 110ms + 40ms);
}
.js .mark path { animation: draw 1.1s var(--ease) .75s both; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } }
@keyframes line-in { from { opacity: 0; transform: translateY(.35em); clip-path: inset(0 0 100% 0); } to { clip-path: inset(0 0 -20% 0); } }
@keyframes draw { from { stroke-dashoffset: 100; } }

/* 滚动出现 */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: calc(var(--i, 0) * 80ms);
}
.js [data-reveal].in { opacity: 1; transform: none; }

/* 一台机器的八天 */
.story { padding: 120px 0 140px; background: var(--surface); }
.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 72px;
  margin-top: 24px;
}
.story-steps { position: relative; padding-left: 36px; --progress: 0; }
.story-steps::before, .story-steps::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  width: 1.5px;
}
.story-steps::before { bottom: 0; background: var(--line); }
.story-steps::after {
  height: calc(var(--progress) * 100%);
  background: var(--accent);
  transition: height .15s linear;
}
.step { position: relative; padding: 6vh 0 22vh; }
.step:first-child { padding-top: 8vh; }
.step:last-child { padding-bottom: 30vh; }
.step::before {
  content: "";
  position: absolute;
  left: -36px;
  top: calc(6vh + 8px);
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
  transition: border-color .3s, background .3s, box-shadow .3s;
}
.step:first-child::before { top: calc(8vh + 8px); }
.step > *:not(.step-media) { opacity: .32; transition: opacity .5s var(--ease); }
.step.is-active > * { opacity: 1; }
.step.is-active::before, .step.is-done::before { border-color: var(--accent); background: var(--accent); }
.step.is-active::before { box-shadow: 0 0 0 5px rgba(29, 91, 216, .15); }
.step-time { color: var(--muted); font-family: var(--mono); font-size: 13px; letter-spacing: 0; }
.step.is-active .step-time { color: var(--accent); }
.step h3 { margin-top: 6px; font-size: 28px; line-height: 1.3; }
.step p:not(.step-time) { margin-top: 12px; color: var(--text-2); }
.step b { color: var(--ink); font-family: var(--mono); letter-spacing: 0; }
.step-media { display: none; }

.story-stage {
  position: sticky;
  top: calc(var(--header) + 56px);
  align-self: start;
  margin-top: 8vh;
}
.stage { position: relative; aspect-ratio: 1440 / 932; }
.frame {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(18px) scale(.985);
  transition: opacity .6s var(--ease), transform .7s var(--ease);
  pointer-events: none;
}
.frame.is-active { opacity: 1; transform: none; }
.frame .window { position: absolute; inset: 0 32px 0 0; }
.stage-phone {
  position: absolute;
  right: 0;
  bottom: -48px;
  width: 26%;
  border-radius: 26px;
  padding: 5px;
  transform: translateY(24px);
  transition: transform .9s var(--ease) .1s;
}
.stage-phone img { border-radius: 21px; }
.frame.is-active .stage-phone { transform: none; }
.stamp {
  position: absolute;
  left: 44%;
  top: 40%;
  padding: 6px 18px;
  border: 3px solid var(--red);
  border-radius: 8px;
  outline: 1.5px solid var(--red);
  outline-offset: 3px;
  color: var(--red);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: .24em;
  line-height: 1.2;
  opacity: 0;
  transform: rotate(-14deg) scale(1.9);
  mix-blend-mode: multiply;
}
.frame.stamped .stamp { animation: stamp .55s cubic-bezier(.3, 1.4, .5, 1) .5s forwards; }
@keyframes stamp {
  0% { opacity: 0; transform: rotate(-20deg) scale(1.9); }
  60% { opacity: .92; transform: rotate(-12deg) scale(.96); }
  100% { opacity: .9; transform: rotate(-13deg) scale(1); }
}
.stage-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 80px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0;
}
.stage-count b { color: var(--ink); font-weight: 600; }
.stage-bar { position: relative; width: 160px; height: 1.5px; background: var(--line-strong); }
.stage-bar i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 20%;
  background: var(--ink);
  transition: width .5s var(--ease);
}

.story-end {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: 64px;
  align-items: center;
  margin-top: 40px;
  padding-top: 56px;
  border-top: 1px solid var(--line-strong);
}
.story-end h3 { font-size: 24px; line-height: 1.4; }
.story-end p { margin-top: 14px; color: var(--text-2); }

/* 后台模块 */
.modules { padding: 120px 0; }
.module-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px;
  margin-top: 48px;
}
.module-col h3 {
  padding-bottom: 12px;
  border-bottom: 1.5px solid var(--ink);
  font-size: 15px;
  letter-spacing: .04em;
}
.module-col li { border-bottom: 1px solid var(--line); }
.module-col li > div, .module-col li > button {
  position: relative;
  display: block;
  width: 100%;
  padding: 14px 52px 14px 0;
  border: 0;
  background: none;
  text-align: left;
}
.module-col li > button { cursor: zoom-in; }
.module-col b {
  display: block;
  color: var(--ink);
  font-size: 15.5px;
  line-height: 1.5;
  transition: color .2s;
}
.module-col span { display: block; margin-top: 2px; color: var(--text-2); font-size: 13.5px; line-height: 1.6; }
.module-col em {
  position: absolute;
  right: 0;
  top: 16px;
  padding: 1px 7px;
  border: 1px solid #c9d7f5;
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-style: normal;
  line-height: 1.6;
  letter-spacing: 0;
  transition: background .2s, color .2s, border-color .2s;
}
.module-col li > button:hover b { color: var(--accent); }
.module-col li > button:hover em { border-color: var(--accent); background: var(--accent); color: #fff; }

/* 小程序画廊 */
.miniapp { padding: 120px 0; background: var(--surface); }
.gallery { margin-top: 8px; }
.gallery-track {
  --edge: max(var(--gutter), calc((100vw - var(--wrap)) / 2));
  display: flex;
  gap: 36px;
  overflow-x: auto;
  padding: 56px var(--edge) 28px;
  scroll-padding-left: var(--edge);
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  cursor: grab;
  outline-offset: -2px;
}
.gallery-track::-webkit-scrollbar { display: none; }
.gallery-track.is-dragging { cursor: grabbing; scroll-snap-type: none; scroll-behavior: auto; }
.gallery-item { flex: 0 0 268px; scroll-snap-align: start; user-select: none; }
.gallery-item .device { transition: transform .5s var(--ease); }
.gallery-item:hover .device { transform: translateY(-6px); }
.gallery-item figcaption { margin-top: 20px; color: var(--text-2); font-size: 14px; line-height: 1.7; }
.gallery-item figcaption b { display: block; margin-bottom: 2px; color: var(--ink); font-size: 15.5px; }
.js .gallery .gallery-item { opacity: 0; transform: translateX(48px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .gallery.in .gallery-item { opacity: 1; transform: none; }
.gallery.in .gallery-item:nth-child(2) { transition-delay: .07s; }
.gallery.in .gallery-item:nth-child(3) { transition-delay: .14s; }
.gallery.in .gallery-item:nth-child(4) { transition-delay: .21s; }
.gallery.in .gallery-item:nth-child(5) { transition-delay: .28s; }
.js .gallery[data-reveal] { opacity: 1; transform: none; }
.gallery-ui { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; }
.gallery-progress { position: relative; width: 200px; height: 1.5px; overflow: hidden; background: var(--line-strong); }
.gallery-progress i {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--thumb, 50%);
  background: var(--ink);
  transform: translateX(var(--offset, 0%));
}
.gallery-nav { display: flex; gap: 8px; }
.gallery-nav button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: none;
  font-family: var(--mono);
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, opacity .2s;
}
.gallery-nav button:hover:not(:disabled) { border-color: var(--ink); background: var(--ink); color: #fff; }
.gallery-nav button:disabled { opacity: .35; cursor: default; }

/* 品牌与主题 */
.brand { padding: 140px 0; background: var(--ink); color: #fff; }
.brand h2 { color: #fff; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.18; }
.brand-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 88px;
  align-items: center;
}
.theme-demo { display: flex; flex-direction: column; align-items: center; }
.theme-phone { position: relative; width: 300px; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08), 0 40px 80px -30px rgba(0, 0, 0, .6); }
.theme-phone img {
  position: absolute;
  top: 7px;
  left: 7px;
  width: calc(100% - 14px);
  opacity: 0;
  transform: scale(1.015);
  transition: opacity .6s var(--ease), transform .8s var(--ease);
}
.theme-phone img:first-child { position: relative; top: 0; left: 0; width: 100%; }
.theme-phone img.is-active { opacity: 1; transform: none; }
.swatches { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 32px; }
.swatches button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px 0 10px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 999px;
  background: none;
  color: var(--dark-text);
  font-size: 13px;
  cursor: pointer;
  transition: color .2s, background .2s, border-color .2s;
}
.swatches button::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0);
  transition: box-shadow .2s;
}
.swatches button::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1.5px;
  background: var(--c);
  transform: scaleX(0);
  transform-origin: left;
}
.swatches button:hover { color: #fff; }
.swatches button[aria-pressed="true"] { border-color: rgba(255, 255, 255, .14); background: rgba(255, 255, 255, .06); color: #fff; }
.swatches button[aria-pressed="true"]::before { box-shadow: 0 0 0 2px var(--ink), 0 0 0 3.5px var(--c); }
.theme-demo.is-auto .swatches button[aria-pressed="true"]::after { animation: tick 3s linear forwards; }
@keyframes tick { to { transform: scaleX(1); } }
.brand-lead { margin-top: 20px; color: var(--dark-text); font-size: 17px; }
.brand-list { margin-top: 40px; border-top: 1px solid var(--dark-line); }
.brand-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--dark-line);
}
.brand-list dt { color: #fff; font-weight: 600; }
.brand-list dd { color: var(--dark-text); }

/* 手机后台 */
.mobile { padding: 140px 0; }
.mobile-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 72px;
  align-items: center;
}
.mobile-copy h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.18; }
.mobile-copy > p { margin-top: 20px; color: var(--text-2); font-size: 17px; }
.mobile-notes { margin-top: 36px; border-top: 1.5px solid var(--ink); }
.mobile-notes li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-2);
  font-size: 15px;
}
.mobile-notes b { color: var(--ink); }
.mobile-shots { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; align-items: start; padding: 40px 0; }
.mobile-shots .device { border-radius: 30px; padding: 6px; will-change: transform; }
.mobile-shots .device img { border-radius: 24px; }
.mobile-shots .device:nth-child(2) { margin-top: 64px; }

/* 开通与问题 */
.start { padding: 120px 0; background: var(--surface); }
.start-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 96px;
  align-items: start;
}
.start h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.2; }
.start-steps { margin-top: 32px; border-top: 1.5px solid var(--ink); }
.start-steps li {
  display: grid;
  grid-template-columns: 52px 1fr;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.start-steps span { color: var(--accent); font-family: var(--mono); font-size: 13px; line-height: 1.9; letter-spacing: 0; }
.start-steps b { color: var(--ink); font-size: 16px; }
.start-steps p { margin-top: 2px; color: var(--text-2); font-size: 15px; }
.price-card {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  column-gap: 24px;
  margin-top: 32px;
  padding: 24px 28px;
  border-radius: 12px;
  background: var(--paper);
}
.price-label { grid-row: span 2; color: var(--muted); font-family: var(--mono); font-size: 12.5px; letter-spacing: 0; }
.price { display: flex; align-items: baseline; gap: 8px; color: var(--ink); }
.price b { font-family: var(--mono); font-size: 44px; font-weight: 600; line-height: 1.1; letter-spacing: -.02em; }
.price span { color: var(--text-2); font-size: 15px; }
.price-note { margin-top: 6px; color: var(--text-2); font-size: 15px; }

.faq-list { margin-top: 32px; border-top: 1.5px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item h3 { font-size: inherit; }
.faq-item button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  padding: 20px 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.faq-item button:hover { color: var(--accent); }
.faq-item i { position: relative; flex: none; width: 14px; height: 14px; }
.faq-item i::before, .faq-item i::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6.25px;
  width: 14px;
  height: 1.5px;
  background: currentColor;
  transition: transform .35s var(--ease);
}
.faq-item i::after { transform: rotate(90deg); }
.faq-item.is-open i::after { transform: rotate(0deg); }
.faq-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .45s var(--ease);
}
.faq-body > div { overflow: hidden; }
.faq-body p { padding: 0 40px 22px 0; color: var(--text-2); opacity: 0; transform: translateY(-6px); transition: opacity .35s, transform .45s var(--ease); }
.faq-item.is-open .faq-body { grid-template-rows: 1fr; }
.faq-item.is-open .faq-body p { opacity: 1; transform: none; }

/* 联系 */
.contact { padding: 120px 0 140px; }
.ticket {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 1px 1px rgba(11, 20, 38, .04), 0 24px 60px -32px rgba(11, 20, 38, .3);
}
.ticket-main { padding: 64px; }
.ticket-main h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.18; }
.ticket-main > p:last-child { max-width: 30em; margin-top: 18px; color: var(--text-2); font-size: 17px; }
.ticket-stub {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 44px;
  border-left: 2px dashed var(--line-strong);
}
.ticket-stub::before, .ticket-stub::after {
  content: "";
  position: absolute;
  left: -14px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--paper);
}
.ticket-stub::before { top: -13px; }
.ticket-stub::after { bottom: -13px; }
.ticket-stub div { padding: 14px 0; border-bottom: 1px solid var(--line); }
.ticket-stub div:last-child { border-bottom: 0; }
.ticket-stub dt { color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: 0; }
.ticket-stub dd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 2px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0;
}
.ticket-stub a { transition: color .2s; }
.ticket-stub a:hover { color: var(--accent); }
.copy {
  flex: none;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: none;
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.copy:hover { border-color: var(--ink); background: var(--ink); color: #fff; }

/* 页脚 */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 8px 28px; padding-top: 28px; padding-bottom: 28px; }
.footer-inner a { transition: color .2s; }
.footer-inner a:hover { color: var(--ink); }
.footer-inner a:last-child { margin-left: auto; }

/* 大图 */
.lightbox {
  width: 100vw;
  max-width: none;
  height: 100vh;
  max-height: none;
  margin: 0;
  padding: 64px 32px 32px;
  border: 0;
  background: rgba(8, 14, 28, .9);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.lightbox::backdrop { background: transparent; }
.lightbox[open] { display: flex; align-items: center; justify-content: center; animation: fade .3s ease both; }
.lightbox[open] img { animation: zoom-in .45s var(--ease) both; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; box-shadow: 0 30px 80px rgba(0, 0, 0, .5); cursor: zoom-out; }
.lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 8px;
  background: none;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, .1); }
@keyframes fade { from { opacity: 0; } }
@keyframes zoom-in { from { opacity: 0; transform: scale(.94) translateY(12px); } }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 60;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity .3s, transform .4s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 平板 */
@media (max-width: 1080px) {
  :root { --gutter: 24px; }
  .nav {
    position: fixed;
    top: var(--header);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 8px var(--gutter) 24px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .25s, transform .35s var(--ease), visibility .25s;
  }
  .nav-open .nav { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
  .nav a::after { display: none; }
  .nav-open .site-header { background: var(--paper); border-bottom-color: var(--line); }
  .nav-toggle { display: block; }
  .header-inner { gap: 12px; }
  .header-inner .btn-small { margin-left: auto; }

  .hero { padding: 56px 0 96px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .ledger { display: grid; grid-template-columns: 1fr 1fr; column-gap: 32px; }
  .hero-phone { right: 0; width: 26%; }

  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .story { padding: 88px 0 96px; }
  .story-grid { display: block; margin-top: 8px; }
  .story-stage { display: none; }
  .story-steps { padding-left: 28px; }
  .step, .step:first-child, .step:last-child { padding: 40px 0 8px; }
  .step::before, .step:first-child::before { left: -28px; top: 48px; }
  .story-steps::after { display: none; }
  .step > *:not(.step-media) { opacity: 1; }
  .step-media { display: block; margin-top: 20px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 12px 30px -18px rgba(11, 20, 38, .3); }
  .story-end { grid-template-columns: 1fr; gap: 28px; margin-top: 56px; }

  .modules, .miniapp, .start { padding: 88px 0; }
  .module-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 32px; }
  .brand, .mobile { padding: 96px 0; }
  .brand-grid, .mobile-grid, .start-grid { grid-template-columns: 1fr; gap: 56px; }
  .brand-copy { order: -1; }
  .ticket { grid-template-columns: 1fr; }
  .ticket-main { padding: 44px 40px 36px; }
  .ticket-stub { padding: 28px 40px 36px; border-left: 0; border-top: 2px dashed var(--line-strong); }
  .ticket-stub::before, .ticket-stub::after { top: -14px; bottom: auto; }
  .ticket-stub::before { left: -13px; }
  .ticket-stub::after { left: auto; right: -13px; }
}

/* 手机 */
@media (max-width: 640px) {
  :root { --gutter: 18px; --header: 56px; }
  body { font-size: 15px; }
  .btn-small { height: 34px; padding: 0 12px; font-size: 13.5px; }
  .hero { padding: 40px 0 72px; }
  .hero-title { font-size: 38px; }
  .hero-lead { margin-top: 20px; font-size: 16px; }
  .hero-actions { gap: 20px; margin-top: 28px; }
  .ledger { grid-template-columns: 1fr; }
  .ledger div { grid-template-columns: 72px 1fr; }
  .hero-stage { margin-top: 48px; }
  .hero-phone { display: none; }
  .footnote { margin-top: 20px; }
  .window { border-radius: 8px; }
  .window-bar { height: 24px; padding: 0 10px; gap: 4px; }
  .window-bar i { width: 6px; height: 6px; }
  .window-bar span { font-size: 10px; margin-left: 6px; }

  .step h3 { font-size: 22px; }
  .module-cols { grid-template-columns: 1fr; gap: 36px; }
  .gallery-track { gap: 20px; padding-top: 40px; }
  .gallery-item { flex-basis: 220px; }
  .theme-phone { width: 250px; }
  .brand-list div { grid-template-columns: 1fr; gap: 2px; }
  .mobile-shots { gap: 10px; padding: 0; }
  .mobile-shots .device { border-radius: 18px; padding: 4px; }
  .mobile-shots .device img { border-radius: 14px; }
  .mobile-shots .device:nth-child(2) { margin-top: 32px; }
  .ticket-main { padding: 36px 24px 28px; }
  .ticket-stub { padding: 24px 24px 28px; }
  .ticket-stub dd { font-size: 16px; }
  .logo { gap: 8px; font-size: 15px; }
  .logo small { margin-left: 4px; font-size: 12.5px; }
  .price b { font-size: 38px; }
  .faq-item button { font-size: 16px; }
  .faq-body p { padding-right: 0; }
  .footer-inner a:last-child { margin-left: 0; }
  .lightbox { padding: 56px 10px 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; transition-delay: 0s !important; }
  .js [data-reveal], .js .gallery .gallery-item { opacity: 1; transform: none; }
}