/* ==========================================================================
   字节神话 ByteMyth — 设计系统
   概念：「印 · 工程纸」 骨白纸面 + 墨黑字 + 印章红点缀 + 等宽规格标签
   ========================================================================== */

/* ---------- 字体（自托管，仅拉丁子集；中文走系统字体栈） ---------- */
@font-face {
  font-family: 'Bricolage';
  src: url('../fonts/bricolage-grotesque-latin-600-normal.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Bricolage';
  src: url('../fonts/bricolage-grotesque-latin-700-normal.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'PlexMono';
  src: url('../fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'PlexMono';
  src: url('../fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- 令牌 ---------- */
:root {
  --paper: #f4f1ea;
  --paper-2: #ebe7dc;
  --paper-3: #e2ddd0;
  --ink: #14150f;
  --ink-2: #33352c;
  --muted: #6d7064;
  --faint: #9a9d90;
  --line: rgba(20, 21, 15, 0.14);
  --line-strong: rgba(20, 21, 15, 0.28);

  --seal: #cf3a25;
  --seal-ink: #a92b19;
  --seal-wash: rgba(207, 58, 37, 0.08);

  --dark: #101109;
  --dark-2: #191a12;
  --dark-line: rgba(244, 241, 234, 0.16);
  --dark-muted: rgba(244, 241, 234, 0.62);

  --font-cn: 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC',
    'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Bricolage', var(--font-cn);
  --font-mono: 'PlexMono', ui-monospace, SFMono-Regular, Menlo, Consolas,
    monospace;
  --font-body: var(--font-cn);

  --wrap: 1200px;
  --wrap-narrow: 880px;
  --pad: clamp(20px, 5vw, 56px);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.5s;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

/* 纸张颗粒 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.16'/%3E%3C/svg%3E");
}

img,
svg {
  max-width: 100%;
  display: block;
}

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--seal);
  color: #fff;
}

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

/* ---------- 排版 ---------- */
h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.022em;
}

h1 {
  font-size: clamp(38px, 6.4vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.16;
}

h3 {
  font-size: clamp(19px, 1.9vw, 23px);
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

.latin {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lead {
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.8;
  color: var(--ink-2);
}

.muted {
  color: var(--muted);
}

.seal {
  color: var(--seal);
}

/* ---------- 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.wrap-narrow {
  max-width: var(--wrap-narrow);
}

.section {
  position: relative;
  padding-block: clamp(64px, 9vw, 130px);
  border-top: 1px solid var(--line);
}

.section--flush {
  border-top: 0;
}

.section--dark {
  background: var(--dark);
  color: var(--paper);
  border-top-color: transparent;
}

.section--dark .muted,
.section--dark .lead {
  color: var(--dark-muted);
}

/* 规格表头：01 / 标题 */
.spec {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: clamp(28px, 4vw, 52px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.section--dark .spec {
  border-bottom-color: var(--dark-line);
}

.spec__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--seal);
  flex: none;
  padding-top: 6px;
}

.spec__head {
  flex: 1 1 auto;
  min-width: 0;
}

.spec__title {
  font-size: clamp(24px, 3vw, 40px);
  letter-spacing: -0.028em;
}

.spec__note {
  margin-top: 12px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.section--dark .spec__note {
  color: var(--dark-muted);
}

/* 细网格背景 */
.grid-lines {
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px 25%
  );
}

/* ---------- 印章标记 ---------- */
.sealmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: none;
  background: var(--seal);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

/* ---------- 头部导航 ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(244, 241, 234, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 3px;
  background: var(--seal);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  flex: none;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand__cn {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand__en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav a {
  position: relative;
  font-size: 15px;
  color: var(--ink-2);
  padding-block: 6px;
  transition: color 0.25s var(--ease);
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav a:hover {
  color: var(--ink);
}

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

.nav a[aria-current='page'] {
  color: var(--ink);
  font-weight: 600;
}

.top__cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  padding: 11px 10px;
  flex-direction: column;
  justify-content: space-between;
}

.burger span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.burger[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.burger[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}
.burger[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.drawer {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 10px var(--pad) 26px;
}

.drawer[hidden] {
  display: none;
}

.drawer a {
  display: block;
  padding: 15px 2px;
  font-size: 17px;
  border-bottom: 1px solid var(--line);
}

.drawer a[aria-current='page'] {
  color: var(--seal);
  font-weight: 600;
}

.drawer .btn {
  margin-top: 18px;
  width: 100%;
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding-inline: 24px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  background: var(--ink);
  color: var(--paper);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--seal);
  transform: translateY(101%);
  transition: transform 0.4s var(--ease);
}

.btn:hover::before {
  transform: translateY(0);
}

.btn:hover {
  border-color: var(--seal);
  color: #fff;
}

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

.btn--ghost {
  background: transparent;
  color: var(--ink);
}

.btn--ghost:hover {
  color: #fff;
}

.btn__arrow {
  width: 15px;
  height: 15px;
  transition: transform 0.35s var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

.section--dark .btn {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--ink);
}

.section--dark .btn:hover {
  border-color: var(--seal);
  color: #fff;
}

.section--dark .btn--ghost {
  background: transparent;
  color: var(--paper);
}

.textlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.textlink:hover {
  color: var(--seal);
  border-bottom-color: var(--seal);
}

.textlink span {
  transition: transform 0.35s var(--ease);
}

.textlink:hover span {
  transform: translateX(4px);
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(56px, 8vw, 112px) clamp(44px, 6vw, 80px);
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
      to right,
      var(--line) 0 1px,
      transparent 1px 12.5%
    ),
    repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 120px);
  opacity: 0.75;
  mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
}

.hero__inner {
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.5);
}

.eyebrow i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--seal);
  flex: none;
  animation: pulse 2.6s var(--ease) infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.75);
  }
}

.hero h1 {
  margin-top: 26px;
  max-width: 17ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--seal);
  white-space: nowrap;
}

.hero__lead {
  margin-top: 26px;
  max-width: 56ch;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.85;
  color: var(--ink-2);
}

.hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.hero__foot {
  margin-top: clamp(44px, 6vw, 72px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

/* 数字条 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stats--plain {
  border: 0;
  background: transparent;
  gap: 0;
}

.stat {
  background: var(--paper);
  padding: 24px 22px;
}

.stats--plain .stat {
  padding: 0 26px;
  border-left: 1px solid var(--line);
}

.stats--plain .stat:first-child {
  padding-left: 0;
  border-left: 0;
}

.stat__num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-display);
  font-size: clamp(30px, 3.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat__num small {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--seal);
}

.stat__label {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.section--dark .stats {
  background: var(--dark-line);
  border-color: var(--dark-line);
}

.section--dark .stat {
  background: var(--dark);
}

.section--dark .stat__label {
  color: var(--dark-muted);
}

/* ---------- 卡片网格 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(288px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  position: relative;
  background: var(--paper);
  padding: 32px 28px 30px;
  display: flex;
  flex-direction: column;
  transition: background 0.4s var(--ease), transform 0.4s var(--ease);
}

.card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 2px;
  width: 100%;
  background: var(--seal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.card:hover {
  background: #fff;
  transform: translateY(-3px);
}

.card:hover::before {
  transform: scaleX(1);
}

.card__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--faint);
  margin-bottom: 20px;
}

.card__title {
  margin-bottom: 12px;
}

.card__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink-2);
}

.card__link {
  margin-top: 22px;
}

/* ---------- 分栏（文字 + 列表） ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: start;
}

.split--reverse > *:first-child {
  order: 2;
}

/* 编号清单 */
.numlist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.numlist li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.numlist li > b {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--seal);
  letter-spacing: 0.1em;
  padding-top: 4px;
}

.numlist h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.numlist p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.section--dark .numlist,
.section--dark .numlist li {
  border-color: var(--dark-line);
}

.section--dark .numlist p {
  color: var(--dark-muted);
}

/* 勾选清单 */
.ticks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ticks li {
  position: relative;
  padding: 11px 0 11px 30px;
  font-size: 15px;
  line-height: 1.7;
  border-bottom: 1px solid var(--line);
}

.ticks li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 19px;
  width: 9px;
  height: 9px;
  background: var(--seal);
  border-radius: 1px;
}

.section--dark .ticks li {
  border-bottom-color: var(--dark-line);
}

/* ---------- 服务详情块 ---------- */
.svc {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(24px, 4vw, 60px);
  padding-block: clamp(38px, 5vw, 62px);
  border-top: 1px solid var(--line);
}

.svc:first-of-type {
  border-top: 0;
}

.svc__head {
  position: sticky;
  top: 92px;
  align-self: start;
}

.svc__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--seal);
  margin-bottom: 14px;
}

.svc__title {
  font-size: clamp(23px, 2.5vw, 33px);
  margin-bottom: 14px;
}

.svc__body > p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.deliver {
  margin-top: 26px;
  padding: 22px 24px;
  background: var(--paper-2);
  border-left: 2px solid var(--seal);
}

.deliver__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.deliver ul {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 流程（阶段） ---------- */
.phases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: var(--dark-line);
  border: 1px solid var(--dark-line);
}

.phase {
  background: var(--dark);
  padding: 30px 26px 34px;
  position: relative;
}

.phase__no {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--dark-line);
  letter-spacing: -0.03em;
}

.phase__title {
  margin-top: 16px;
  font-size: 17px;
  margin-bottom: 10px;
}

.phase__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dark-muted);
}

/* ---------- 团队 ---------- */
.team {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.member {
  background: var(--paper);
  padding: 28px 24px;
  transition: background 0.35s var(--ease);
}

.member:hover {
  background: #fff;
}

.member__name {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 4px;
}

.member__role {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--seal);
  margin-bottom: 14px;
}

.member__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

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

.inforow {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.inforow dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.inforow dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
}

.inforow dd a {
  border-bottom: 1px solid var(--line-strong);
}

.inforow dd a:hover {
  color: var(--seal);
  border-bottom-color: var(--seal);
}

.form {
  padding: clamp(24px, 3vw, 34px);
  background: var(--paper-2);
  border: 1px solid var(--line);
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  font-size: 15px;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--seal);
  background: #fff;
}

.field textarea {
  min-height: 128px;
  resize: vertical;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form__note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 收尾 CTA ---------- */
.cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding-block: clamp(48px, 6vw, 84px);
}

.cta h2 {
  max-width: 22ch;
}

.cta__acts {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.foot {
  border-top: 1px solid var(--line);
  padding-block: 54px 34px;
  background: var(--paper);
}

.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: 34px;
}

.foot h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 16px;
}

.foot ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.foot li {
  margin-bottom: 10px;
  font-size: 14.5px;
}

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

.foot__brand p {
  font-size: 14.5px;
  color: var(--muted);
  max-width: 40ch;
  line-height: 1.8;
  margin-top: 16px;
}

.foot__bottom {
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--d, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 16px;
  -webkit-mask-image: linear-gradient(
    to right,
    transparent,
    #000 8%,
    #000 92%,
    transparent
  );
  mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}

.marquee__track {
  display: flex;
  gap: 46px;
  width: max-content;
  animation: slide 34s linear infinite;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

.marquee span {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 46px;
}

.marquee span::after {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--seal);
  border-radius: 50%;
}

@keyframes slide {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav,
  .top__cta .btn {
    display: none;
  }
  .burger {
    display: flex;
  }
  .drawer:not([hidden]) {
    display: block;
  }
  .foot__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .split,
  .svc,
  .contact-grid,
  .cta {
    grid-template-columns: 1fr;
  }
  .split--reverse > *:first-child {
    order: 0;
  }
  .svc__head {
    position: static;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats--plain {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 26px;
  }
  .stats--plain .stat {
    padding-left: 0;
    padding-right: 20px;
    border-left: 0;
  }
  .stats--plain .stat:nth-child(even) {
    border-left: 1px solid var(--line);
    padding-left: 22px;
  }
  .form__row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15.5px;
  }
  .foot__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .spec {
    gap: 12px;
  }
  .inforow {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .numlist li {
    grid-template-columns: 40px 1fr;
    gap: 12px;
  }
}