/* ==========================================================================
   VBot 官网 v3 — 设计系统
   视觉锚点：客户端 paper 主题（浅色 + 金 #8C651E）
   铁律：去卡片化 / 发丝线分区 / 投影只给"实体"（截图、按钮）
   ========================================================================== */

:root {
  --paper: #ffffff;
  --bg: #f7f8fa;
  --bg-2: #f1f3f5;
  --ink: #20242b;
  --ink-2: #2a2f38;

  --text: #20242b;
  --dim: #5d6670;
  --faint: #667079;

  --line: #dde1e5;
  --line-2: #d1d6dc;
  --line-strong: #b7bec7;

  --gold: #8c651e;
  --gold-2: #7a5718;
  --gold-3: #c7a262;
  --gold-tint: #f7f1e3;
  --gold-line: rgba(140, 101, 30, 0.28);

  --onink: #f2f2f4;
  --onink-dim: #a9b0ba;

  --wrap: 1180px;
  --gutter: clamp(20px, 4.6vw, 56px);
  --radius: 8px;
  --radius-sm: 5px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --sans: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC",
    "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-locked {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, h4, p, ul, ol, figure, dl {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--gold-tint);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 100;
  background: var(--paper);
  border: 1px solid var(--line-2);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
}

.skip:focus {
  left: 12px;
}

.wrap {
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------- 版式 ---- */

.display {
  font-size: clamp(40px, 6.6vw, 84px);
  line-height: 1.06;
  font-weight: 750;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.display .soft {
  color: var(--faint);
}

h2 {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.18;
  font-weight: 750;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

h3 {
  font-size: 20px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -0.012em;
}

.lead {
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--dim);
  max-width: 62ch;
  text-wrap: pretty;
}

.small {
  font-size: 13.5px;
  color: var(--faint);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-transform: none;
}

.eyebrow::before {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--gold-3);
}

.band {
  padding: clamp(64px, 8.4vw, 116px) 0;
}

.band-soft {
  background: var(--bg);
}

.band-paper {
  background: var(--paper);
}

.band-ink {
  background: var(--ink);
  color: var(--onink);
}

.band-ink .eyebrow {
  color: var(--gold-3);
}

.band-ink .eyebrow::before {
  background: rgba(199, 162, 98, 0.6);
}

.band-ink .lead,
.band-ink p {
  color: var(--onink-dim);
}

.band-ink h2,
.band-ink h3 {
  color: var(--onink);
}

.hairline-top {
  border-top: 1px solid var(--line);
}

.hairline-bottom {
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(20px, 4vw, 64px);
  align-items: end;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.section-head .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: 4px;
}

.section-head .lead {
  padding-bottom: 6px;
}

/* --------------------------------------------------------------- 按钮 ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: var(--paper);
  color: var(--text);
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease),
    color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.btn .arw {
  font-size: 15px;
  line-height: 1;
  transition: transform 0.18s var(--ease);
}

.btn:hover .arw {
  transform: translateY(2px);
}

.btn-primary {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}

.btn-primary:hover {
  background: var(--gold-2);
  border-color: var(--gold-2);
}

.btn-ghost {
  background: transparent;
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.band-ink .btn {
  border-color: rgba(255, 255, 255, 0.24);
  background: transparent;
  color: var(--onink);
}

.band-ink .btn:hover {
  border-color: rgba(255, 255, 255, 0.5);
}

.band-ink .btn-primary {
  background: var(--gold-3);
  border-color: var(--gold-3);
  color: var(--ink);
}

.band-ink .btn-primary:hover {
  background: #d8b578;
  border-color: #d8b578;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.textlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 650;
  color: var(--gold);
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 2px;
  transition: border-color 0.18s var(--ease), gap 0.18s var(--ease);
}

.textlink:hover {
  border-color: var(--gold);
  gap: 12px;
}

.band-ink .textlink {
  color: var(--gold-3);
  border-color: rgba(199, 162, 98, 0.4);
}

/* --------------------------------------------------------------- 头部 ---- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.site-head.is-scrolled {
  border-bottom-color: var(--line);
}

.head-in {
  display: flex;
  align-items: center;
  gap: 36px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.brand img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
  font-size: 14.5px;
  color: var(--dim);
}

.nav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.16s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s var(--ease);
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

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

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  background: var(--paper);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 8px 0 20px;
  border-top: 1px solid var(--line);
}

.mobile-nav a {
  padding: 14px 2px;
  font-size: 16px;
  border-bottom: 1px solid var(--line);
}

.mobile-nav .mobile-cta {
  margin-top: 16px;
  border: 0;
  border-radius: 999px;
  background: var(--gold);
  color: #fff;
  text-align: center;
  padding: 13px 20px;
  font-weight: 650;
}

/* --------------------------------------------------------------- Hero ---- */

.hero {
  position: relative;
  padding: clamp(52px, 7vw, 96px) 0 clamp(48px, 6vw, 76px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 78% 0%, rgba(199, 162, 98, 0.14), transparent 70%),
    radial-gradient(40% 40% at 10% 10%, rgba(32, 36, 43, 0.035), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(32, 36, 43, 0.055) 1px, transparent 1px);
  background-size: 148px 100%;
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
  opacity: 0.55;
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  z-index: 1;
}

.hero-copy {
  max-width: 940px;
}

.hero-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 244px;
  gap: clamp(28px, 4vw, 60px);
  align-items: end;
}

.hero-facts {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 4px;
}

.hero-facts > div {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.hero-facts dt {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.hero-facts dd {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--dim);
}

@media (max-width: 1060px) {
  .hero-top {
    grid-template-columns: 1fr;
  }

  .hero-facts {
    display: none;
  }
}

.hero .display {
  margin-top: 22px;
}

.hero .lead {
  margin-top: 26px;
  max-width: 68ch;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--faint);
  letter-spacing: 0.01em;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.hero-meta span + span::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--line-strong);
}

.hero-stage {
  margin-top: clamp(34px, 5vw, 62px);
}

/* 截图舞台：只给"实体"一点投影 */
.stage {
  position: relative;
  padding: clamp(14px, 2.4vw, 30px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(150deg, #f3eee3 0%, #f7f8fa 46%, #eef1f4 100%);
}

.stage .shot {
  box-shadow: 0 24px 60px -30px rgba(32, 36, 43, 0.35);
}

.shot {
  display: block;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
  padding: 0;
  cursor: zoom-in;
  width: 100%;
  text-align: left;
}

.shot img {
  width: 100%;
}

.shot:hover {
  border-color: var(--gold-3);
}

.caption {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--faint);
}

/* --------------------------------------------------------------- 产品 ---- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.product {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.product:hover {
  border-color: var(--gold-3);
  transform: translateY(-2px);
}

.product-top {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.product-kind {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.product h3 {
  font-size: clamp(24px, 2.6vw, 30px);
  letter-spacing: -0.025em;
}

.product h3 small {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--faint);
  margin-top: 6px;
}

.product p {
  color: var(--dim);
  font-size: 15px;
  margin-top: 12px;
}

.product-visual {
  margin-top: 24px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg);
}

.product-visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
}

.product-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--faint);
}


.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 650;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  color: var(--dim);
  background: var(--paper);
}

.badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line-strong);
}

.badge-ok {
  border-color: rgba(140, 101, 30, 0.28);
  color: var(--gold);
  background: var(--gold-tint);
}

.badge-ok::before {
  background: var(--gold);
}

.badge-wait::before {
  background: var(--gold-3);
}


.hardware {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  margin-top: 20px;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--ink);
  color: var(--onink);
}

.hardware h3 {
  color: var(--onink);
  font-size: clamp(22px, 2.4vw, 28px);
}

.hardware p {
  color: var(--onink-dim);
  margin-top: 12px;
}

.hardware-facts {
  display: grid;
  gap: 12px;
}

.hardware-facts li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  color: var(--onink-dim);
  font-size: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.hardware-facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.hardware-facts b {
  color: var(--gold-3);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
}

.hardware .textlink {
  color: var(--gold-3);
  border-color: rgba(199, 162, 98, 0.4);
}

.hardware .textlink:hover {
  border-color: var(--gold-3);
}

/* 流程示意图（不是软件界面） */
.flow {
  display: grid;
  gap: 0;
  padding: 18px 22px;
}

.flow-step {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.flow-step:last-of-type {
  border-bottom: 0;
}

.flow-n {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  border-radius: 50%;
  border: 1px solid var(--gold-3);
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1;
}

.flow-step h4 {
  margin: 0;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.flow-step p {
  margin-top: 2px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--faint);
}

.flow-panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.flow-panel .flow {
  padding: 18px 26px 8px;
}

.flow-panel .flow-step {
  padding: 18px 0;
}

.flow-panel .flow-step h4 {
  font-size: 16px;
}

.flow-panel .flow-step p {
  font-size: 13px;
}

.flow-caption {
  padding: 4px 26px 18px;
  font-size: 12px;
  color: var(--faint);
}

/* --------------------------------------------------------------- 分区块 ---- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
}

.split.reverse {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
}

.split + .split {
  margin-top: clamp(48px, 6vw, 96px);
}

.split-copy .display {
  font-size: clamp(26px, 3.2vw, 40px);
  letter-spacing: -0.03em;
}

.split-copy p {
  color: var(--dim);
  margin-top: 16px;
}

.band-ink .split-copy p {
  color: var(--onink-dim);
}

.feature-list {
  margin-top: 24px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.band-ink .feature-list {
  border-color: rgba(255, 255, 255, 0.14);
}

.feature-list li {
  position: relative;
  padding: 13px 0 13px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-size: 14.5px;
}

.band-ink .feature-list li {
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--onink-dim);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 1px;
  background: var(--gold-3);
}

.feature-list b {
  color: var(--text);
  font-weight: 650;
}

.band-ink .feature-list b {
  color: var(--onink);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  counter-reset: step;
}

.step {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.band-ink .step {
  border-color: rgba(255, 255, 255, 0.14);
}

.step-n {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.band-ink .step-n {
  color: var(--gold-3);
}

.step h3 {
  margin-top: 12px;
}

.step p {
  margin-top: 8px;
  color: var(--dim);
  font-size: 14.5px;
}

.band-ink .step p {
  color: var(--onink-dim);
}

.note-line {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 2px solid var(--gold-3);
  background: var(--gold-tint);
  color: var(--gold-2);
  font-size: 13.5px;
  line-height: 1.7;
  border-radius: 0 4px 4px 0;
}

.band-ink .note-line {
  background: rgba(199, 162, 98, 0.1);
  color: var(--gold-3);
}

/* 四列步骤（语音页四步开播） */
.steps.cols-4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  row-gap: clamp(24px, 3vw, 40px);
}

.mono {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--faint);
}

@media (max-width: 900px) {
  .steps.cols-4 {
    grid-template-columns: 1fr;
  }
}
/* ------------------------------------------------------------- 下载中心 ---- */

.dl-list {
  border-top: 1px solid var(--line);
}

.dl-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) auto;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: clamp(24px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--line);
}

.dl-kind {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.dl-name h3 {
  margin-top: 8px;
  font-size: clamp(22px, 2.2vw, 28px);
  letter-spacing: -0.02em;
}

.dl-name h3 a:hover {
  color: var(--gold);
}

.dl-name > p {
  color: var(--dim);
  font-size: 14px;
  margin-top: 6px;
}

.dl-note {
  color: var(--faint) !important;
  font-size: 12.5px !important;
}

.dl-meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  font-size: 13px;
  color: var(--dim);
}

.dl-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--faint);
  align-self: center;
}

.dl-action {
  justify-self: end;
}

.dl-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.dl-facts div {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.dl-facts dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.dl-facts dd {
  margin: 6px 0 0;
  font-size: 14.5px;
  color: var(--text);
}

/* --------------------------------------------------------------- 更新 ---- */

.releases {
  border-top: 1px solid var(--line);
}

.releases details {
  border-bottom: 1px solid var(--line);
}

.releases summary {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 20px 34px 20px 0;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.releases summary::-webkit-details-marker {
  display: none;
}

.releases summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 18px;
  font-size: 18px;
  font-weight: 400;
  color: var(--faint);
}

.releases details[open] summary::after {
  content: "−";
}

.releases .rel-ver {
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
  min-width: 62px;
}

.releases time {
  font-size: 12.5px;
  color: var(--faint);
  letter-spacing: 0.02em;
}

.releases details p {
  padding: 0 0 22px 80px;
  color: var(--dim);
  font-size: 14.5px;
  max-width: 78ch;
}

.latest-list {
  counter-reset: rel;
}

.latest-list li {
  display: grid;
  grid-template-columns: 74px 100px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.latest-list .rel-ver {
  font-weight: 700;
  color: var(--gold);
  font-size: 15px;
}

.latest-list time {
  font-size: 12.5px;
  color: var(--faint);
}

.latest-list p {
  color: var(--dim);
  font-size: 14.5px;
}

/* --------------------------------------------------------------- FAQ ---- */

.faq {
  max-width: 860px;
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq details:first-of-type {
  border-top: 1px solid var(--line);
}

.faq summary {
  position: relative;
  padding: 20px 34px 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 650;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 18px;
  color: var(--gold);
  font-size: 19px;
  font-weight: 400;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  padding: 0 0 22px;
  color: var(--dim);
  font-size: 14.5px;
  max-width: 76ch;
}

/* --------------------------------------------------------------- 404 ---- */

.notfound {
  min-height: 62vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 80px 0;
}

.notfound .code {
  font-family: var(--mono);
  font-size: clamp(76px, 14vw, 160px);
  line-height: 1;
  color: #efe4cf;
  letter-spacing: -0.06em;
  -webkit-text-stroke: 2px var(--gold-3);
}

.notfound h1 {
  font-size: clamp(24px, 3vw, 34px);
  margin-top: 12px;
}

.notfound p {
  color: var(--dim);
  margin-top: 12px;
}

/* --------------------------------------------------------------- 页脚 ---- */

.site-foot {
  background: var(--ink);
  color: var(--onink);
  padding: clamp(48px, 6vw, 76px) 0 28px;
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 56px);
}

.brand-onink {
  color: var(--onink);
}

.foot-brand p {
  margin-top: 16px;
  color: var(--onink-dim);
  font-size: 13.5px;
  max-width: 30ch;
}

.foot-col .foot-h {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--gold-3);
  line-height: 1.6;
}

.foot-col ul {
  margin-top: 12px;
  display: grid;
  gap: 2px;
}

.foot-col a,
.foot-col li {
  color: var(--onink-dim);
  font-size: 13.5px;
  line-height: 1.6;
}

.foot-col a {
  display: inline-block;
  padding: 4px 0;
} 

.foot-col a:hover {
  color: var(--onink);
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  justify-content: space-between;
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  color: var(--onink-dim);
}

/* --------------------------------------------------------------- 产品页 ---- */

.page-hero {
  position: relative;
  padding: clamp(40px, 5vw, 64px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 60%;
  height: 120%;
  background: radial-gradient(closest-side, rgba(199, 162, 98, 0.13), transparent);
  pointer-events: none;
}

.page-hero .wrap {
  position: relative;
}

.page-hero .display {
  font-size: clamp(34px, 5.2vw, 64px);
  margin-top: 18px;
}

.page-hero .lead {
  margin-top: 20px;
}

.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--faint);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.crumb a {
  color: var(--faint);
  padding: 4px 2px;
  transition: color 0.16s var(--ease);
}

.crumb a:hover {
  color: var(--gold);
}

.crumb span:not(:first-child)::before {
  content: "/";
  margin-right: 10px;
  color: var(--line-strong);
}

.crumb span:last-child {
  color: var(--dim);
}

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.hero-aside {
  padding-top: 8px;
}

.status-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: clamp(20px, 2.4vw, 26px);
  background: var(--paper);
}

.status-card p {
  color: var(--dim);
  font-size: 13.5px;
  line-height: 1.7;
  margin-top: 12px;
}

.status-card h3 {
  font-size: 20px;
}

.status-card h3 .num {
  color: var(--faint);
  font-size: 14px;
  font-weight: 500;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

.status-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--faint);
  margin-bottom: 12px;
}


.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  padding: 9px 18px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--paper);
  font-size: 14px;
  color: var(--dim);
}

.step-list {
  display: grid;
  border-top: 1px solid var(--line);
  counter-reset: step;
}

.step-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 28px);
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.step-list h3 {
  font-size: 19px;
}

.step-list p {
  margin-top: 6px;
  color: var(--dim);
  font-size: 14.5px;
}

.step-list .step-n {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.dl-action {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.band-ink .shot {
  border-color: rgba(255, 255, 255, 0.18);
}

.band-ink .shot:hover {
  border-color: var(--gold-3);
}

.band-ink .caption {
  color: var(--onink-dim);
}

.band-ink .hero-meta {
  color: var(--onink-dim);
}

.band-ink .hero-meta span + span::before {
  background: rgba(255, 255, 255, 0.3);
}

@media (max-width: 900px) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .dl-action {
    align-items: flex-start;
  }

  .step-list li {
    grid-template-columns: 52px minmax(0, 1fr);
  }
}

/* ------------------------------------------------------------- 灯箱 ---- */

.lightbox {
  border: 0;
  padding: 16px;
  max-width: min(1200px, 94vw);
  max-height: 92vh;
  background: var(--paper);
  border-radius: 10px;
}

.lightbox::backdrop {
  background: rgba(20, 22, 26, 0.78);
}

.lightbox img {
  max-height: 80vh;
  width: auto;
  margin-inline: auto;
  object-fit: contain;
}

.lightbox button {
  display: block;
  margin-left: auto;
  margin-bottom: 12px;
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  padding: 6px 16px;
  cursor: pointer;
  font-size: 13px;
}

/* --------------------------------------------------------------- 动效 ---- */

/* 默认可见；只有 JS 加上 .is-in 时才做一次进入动画。
   这样即使 site.js 加载失败，正文也不会停在 opacity:0。 */
@keyframes vb-reveal {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.js .reveal.is-in {
  animation: vb-reveal 0.7s var(--ease) both;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal.is-in {
    animation: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ------------------------------------------------------------- 响应式 ---- */

@media (max-width: 1060px) {
  .nav {
    gap: 22px;
  }

  .foot-grid {
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .mobile-nav:not([hidden]) {
    display: flex;
  }

  .head-actions .btn {
    display: inline-flex;
    height: 38px;
    padding: 0 16px;
    font-size: 13.5px;
  }

  .nav-toggle {
    display: inline-flex;
    width: 38px;
    height: 38px;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .split,
  .split.reverse {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .split.reverse .split-copy {
    order: 2;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .steps .step {
    padding: 18px 0;
  }

  .hardware {
    grid-template-columns: 1fr;
  }

  .dl-row {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .dl-action {
    justify-self: start;
  }

  .dl-facts {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .latest-list li {
    grid-template-columns: 64px 88px;
    gap: 8px 16px;
  }

  .latest-list li p {
    grid-column: 1 / -1;
  }

  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .head-in {
    height: 60px;
  }

  .stage {
    padding: 10px;
  }

  .hero::after {
    display: none;
  }

  .display {
    font-size: clamp(34px, 10.4vw, 46px);
  }

  .releases details p {
    padding-left: 0;
  }

  .foot-grid {
    grid-template-columns: 1fr;
  }

  .foot-base {
    flex-direction: column;
    gap: 8px;
  }

  .hero-meta span + span::before {
    display: none;
  }

  .hero-meta {
    gap: 4px 18px;
  }

  .caption {
    flex-direction: column;
    gap: 4px;
  }
}

@media print {
  .site-head,
  .site-foot,
  .actions,
  .nav-toggle {
    display: none;
  }
}