/* =========================================================
   卡乐购 KALEGOU — 设计系统
   语言：直角 / 细线网格 / 墨黑 + 米白 + 单一砖红强调
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #14130f;
  --ink-2: #38372f;
  --muted: #79786e;
  --paper: #f5f3ee;
  --paper-2: #ece9e1;
  --white: #ffffff;
  --line: rgba(20, 19, 15, .12);
  --line-2: rgba(20, 19, 15, .24);
  --accent: #a63a24;
  --accent-2: #7f2b19;
  --max: 1180px;
  --gut: 28px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. 重置：全局直角 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  border-radius: 0 !important;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}

p { margin: 0; }

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

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

/* ---------- 3. 版式工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gut);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent);
}

.lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

.mono {
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

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

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- 4. 站点头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(245, 243, 238, .94);
  border-bottom: 1px solid var(--line);
}

@supports (backdrop-filter: blur(1px)) {
  .site-header { backdrop-filter: blur(10px); }
}

.hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
}

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

.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--ink);
  color: var(--paper);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.brand__mark span {
  transform: translateY(-1px);
  font-size: 13px;
  letter-spacing: .04em;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .06em;
  line-height: 1.2;
}

.brand__latin {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .28em;
  color: var(--muted);
  text-transform: uppercase;
  line-height: 1.2;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav a {
  position: relative;
  padding: 9px 14px;
  font-size: 14px;
  color: var(--ink-2);
  border: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

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

.nav a[aria-current="page"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

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

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-2);
  align-items: center;
  justify-content: center;
}

.menu-btn span {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: var(--ink);
  transition: transform .2s var(--ease);
}

.menu-btn span::before,
.menu-btn span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--ink);
  transition: transform .2s var(--ease);
}

.menu-btn span::before { top: -5px; }
.menu-btn span::after { top: 5px; }

.menu-btn[aria-expanded="true"] span { background: transparent; }
.menu-btn[aria-expanded="true"] span::before { transform: translateY(5px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span::after { transform: translateY(-5px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.mobile-nav.is-open { display: block; }

.mobile-nav__inner {
  padding: 8px 0 20px;
}

.mobile-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  font-size: 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}

.mobile-nav a::after {
  content: "→";
  font-size: 13px;
  color: var(--muted);
}

.mobile-nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

.mobile-nav a[aria-current="page"]::after { color: var(--accent); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn--solid {
  background: var(--ink);
  color: var(--paper);
}

.btn--solid:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn--ghost {
  border-color: var(--line-2);
}

.btn__arrow {
  font-size: 13px;
  transition: transform .2s var(--ease);
}

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

.btn__arrow--down { transform: rotate(90deg); }
.btn:hover .btn__arrow--down { transform: rotate(90deg) translateX(4px); }

/* ---------- 6. 首屏 ---------- */
.hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: -1px -1px;
  background-color: var(--paper);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, var(--paper) 0%, rgba(245, 243, 238, .35) 45%, rgba(245, 243, 238, .9) 100%);
}

.hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 84px;
}

.hero__copy { max-width: 560px; }

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(38px, 4.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero__lead {
  margin-top: 24px;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 46px 0 0;
  border-top: 1px solid var(--line);
}

.hero__stats > div {
  padding: 18px 18px 0 0;
  border-right: 1px solid var(--line);
}

.hero__stats > div:last-child { border-right: 0; }
.hero__stats > div:not(:first-child) { padding-left: 18px; }

.hero__stats dt {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: -.02em;
}

.hero__stats dd {
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, .55);
}

.hero__figure figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero__figure figcaption b {
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .14em;
}

.hero-svg { width: 100%; height: auto; }

/* ---------- 7. SVG 动效 ---------- */
.anim-spin { animation: kg-spin 64s linear infinite; transform-origin: 340px 232px; }
.anim-spin--rev { animation: kg-spin 96s linear infinite reverse; transform-origin: 340px 232px; }

.anim-float-a { animation: kg-float 7.5s ease-in-out infinite; }
.anim-float-b { animation: kg-float 7.5s ease-in-out infinite .8s; }
.anim-float-c { animation: kg-float 7.5s ease-in-out infinite 1.6s; }

.anim-dash { stroke-dasharray: 7 7; animation: kg-dash 1.6s linear infinite; }

.anim-pulse { animation: kg-pulse 2.8s ease-in-out infinite; transform-origin: center; }
.anim-pulse--slow { animation: kg-pulse 4.2s ease-in-out infinite .6s; }

.anim-sweep { animation: kg-sweep 6.5s cubic-bezier(.55, 0, .45, 1) infinite; }

.anim-blink { animation: kg-blink 1.2s steps(1) infinite; }

.anim-bar { animation: kg-bar 3.4s ease-in-out infinite; transform-origin: left center; }
.anim-bar--2 { animation: kg-bar 3.4s ease-in-out infinite .5s; }
.anim-bar--3 { animation: kg-bar 3.4s ease-in-out infinite 1s; }

@keyframes kg-spin { to { transform: rotate(360deg); } }

@keyframes kg-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

@keyframes kg-dash { to { stroke-dashoffset: -28; } }

@keyframes kg-pulse {
  0%, 100% { opacity: .18; transform: scale(.8); }
  50% { opacity: 1; transform: scale(1); }
}

@keyframes kg-sweep {
  0% { transform: translateY(0); opacity: 0; }
  8% { opacity: .8; }
  88% { opacity: .8; }
  100% { transform: translateY(464px); opacity: 0; }
}

@keyframes kg-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@keyframes kg-bar {
  0%, 100% { transform: scaleX(.35); }
  50% { transform: scaleX(1); }
}

/* ---------- 8. 区块与网格 ---------- */
.section {
  padding: 92px 0;
  border-bottom: 1px solid var(--line);
}

.section--tight { padding: 60px 0; }

.section--ink {
  background: var(--ink);
  color: var(--paper);
  border-bottom-color: rgba(255, 255, 255, .12);
}

.section--ink .muted,
.section--ink .eyebrow,
.section--ink .lead { color: rgba(245, 243, 238, .62); }

.section--ink .eyebrow::before { background: var(--accent); }

.sec-head {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) minmax(0, 360px);
  gap: 28px;
  align-items: start;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

.section--ink .sec-head { border-bottom-color: rgba(255, 255, 255, .12); }

.sec-head__idx {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--accent);
  padding-top: 8px;
}

.sec-head h2 {
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.15;
}

.sec-head p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
  padding-top: 6px;
}

/* 1px 网格：用 gap + 背景线实现直角格 */
.cells {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.cells--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cells--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cells--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.cell {
  position: relative;
  background: var(--paper);
  padding: 32px 28px 34px;
  transition: background-color .28s var(--ease), color .28s var(--ease);
}

.cell:hover {
  background: var(--ink);
  color: var(--paper);
}

.cell:hover .cell__num,
.cell:hover .cell__desc,
.cell:hover .cell__meta { color: rgba(245, 243, 238, .6); }

.cell:hover .cell__title { color: var(--paper); }

.cell__num {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}

.cell__title {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.cell__desc {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.cell__meta {
  margin: 18px 0 0;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  text-transform: uppercase;
}

.cell__tag {
  display: inline-block;
  margin-top: 18px;
  padding: 4px 8px;
  border: 1px solid var(--line-2);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.cell:hover .cell__tag { border-color: rgba(245, 243, 238, .4); color: rgba(245, 243, 238, .8); }

/* 编号步骤 */
.steps {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.steps--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.step {
  background: var(--paper);
  padding: 30px 26px 34px;
}

.step__n {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.step h3 {
  margin: 16px 0 0;
  font-size: 16px;
  font-weight: 700;
}

.step p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* 页面头部 */
.page-head {
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: -1px -1px;
}

.page-head__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 48px;
  align-items: end;
  padding: 64px 0 44px;
}

.page-head h1 {
  margin: 18px 0 0;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.08;
}

.page-head .lead {
  margin-top: 18px;
  max-width: 34em;
}

.page-head__aside {
  border-left: 1px solid var(--line);
  padding-left: 28px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}

.page-head__aside dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  margin: 0;
}

.page-head__aside dt {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--accent);
  padding-top: 2px;
}

.page-head__aside dd { margin: 0; }

.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.crumbs a:hover { color: var(--accent); }
.crumbs span { color: var(--accent); }

/* ---------- 9. 表格 ---------- */
.tbl-wrap {
  border: 1px solid var(--line);
  overflow-x: auto;
}

table.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  min-width: 640px;
}

.tbl th,
.tbl td {
  padding: 16px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.tbl th {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--paper-2);
  white-space: nowrap;
}

.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover td { background: rgba(20, 19, 15, .03); }
.tbl td.mono { font-size: 12.5px; color: var(--ink-2); }

/* ---------- 10. 表单 ---------- */
.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.field {
  background: var(--paper);
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field--full { grid-column: 1 / -1; }

.field label {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid var(--line-2);
  background: transparent;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  outline: none;
  transition: border-color .2s var(--ease);
}

.field input:focus,
.field select:focus,
.field textarea:focus { border-bottom-color: var(--accent); }

.field textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.8;
}

.field select {
  appearance: none;
  padding-right: 24px;
}

.form__foot {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--paper);
  padding: 20px;
}

.form__note {
  font-size: 12px;
  color: var(--muted);
}

.form__status {
  display: none;
  grid-column: 1 / -1;
  margin: 0;
  padding: 14px 18px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 13px;
  background: var(--paper);
}

.form__status.is-visible { display: block; }

/* ---------- 11. 滚动字幕 ---------- */
.ticker {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--ink);
  color: var(--paper);
}

.ticker__track {
  display: flex;
  width: max-content;
  animation: kg-ticker 42s linear infinite;
}

.ticker:hover .ticker__track { animation-play-state: paused; }

.ticker__group {
  display: flex;
  align-items: center;
  padding: 12px 0;
}

.ticker__item {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 0 26px;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  white-space: nowrap;
  color: rgba(245, 243, 238, .72);
}

.ticker__item::after {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--accent);
}

@keyframes kg-ticker { to { transform: translateX(-50%); } }

/* ---------- 12. CTA ---------- */
.cta {
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: center;
  padding: 68px 0;
}

.cta h2 {
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.12;
}

.cta p {
  margin-top: 14px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(245, 243, 238, .62);
}

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

.cta .btn { border-color: rgba(245, 243, 238, .45); color: var(--paper); }
.cta .btn:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.cta .btn--solid { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.cta .btn--solid:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(245, 243, 238, .6);
  padding: 64px 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.footer__brand .brand__mark { background: var(--paper); color: var(--ink); }
.footer__brand .brand__name { color: var(--paper); }
.footer__brand .brand__latin { color: rgba(245, 243, 238, .45); }

.footer__desc {
  margin-top: 18px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.9;
}

.footer h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--paper);
  margin-bottom: 16px;
}

.footer ul { display: grid; gap: 9px; }
.footer li a { font-size: 13.5px; color: rgba(245, 243, 238, .62); transition: color .2s var(--ease); }
.footer li a:hover { color: var(--paper); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 0 26px;
  font-size: 11.5px;
  letter-spacing: .04em;
  color: rgba(245, 243, 238, .42);
}

/* ---------- 14. 动效与响应式 ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

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

@media (max-width: 1024px) {
  .nav { display: none; }
  .menu-btn { display: inline-flex; }
  .hdr__cta .btn { display: none; }

  .hero__grid { grid-template-columns: 1fr; gap: 44px; padding-top: 60px; padding-bottom: 60px; }
  .hero::after { background: linear-gradient(180deg, rgba(245, 243, 238, 0) 0%, rgba(245, 243, 238, .8) 100%); }
  .hero__copy { max-width: none; }

  .sec-head { grid-template-columns: 64px minmax(0, 1fr); gap: 16px 20px; }
  .sec-head p { grid-column: 2; }

  .page-head__inner { grid-template-columns: 1fr; gap: 28px; padding: 52px 0 36px; }
  .page-head__aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 20px; }

  .cells--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
}

@media (max-width: 680px) {
  :root { --gut: 20px; }

  .section { padding: 64px 0; }
  .section--tight { padding: 44px 0; }

  .hero h1 { font-size: clamp(32px, 8.4vw, 44px); }
  .hero__stats { grid-template-columns: 1fr; }
  .hero__stats > div { border-right: 0; border-bottom: 1px solid var(--line); padding: 14px 0; }
  .hero__stats > div:not(:first-child) { padding-left: 0; }
  .hero__stats > div:last-child { border-bottom: 0; }

  .sec-head { grid-template-columns: 1fr; }
  .sec-head__idx { padding-top: 0; }
  .sec-head p { grid-column: 1; }

  .cells--2,
  .cells--3,
  .cells--4 { grid-template-columns: 1fr; }
  .steps--4 { grid-template-columns: 1fr; }
  .cell { padding: 26px 22px 28px; }

  .form { grid-template-columns: 1fr; }
  .cta__inner { grid-template-columns: 1fr; gap: 28px; padding: 52px 0; }
  .footer__grid { grid-template-columns: 1fr; }
  .tbl th, .tbl td { padding: 13px 14px; }
}

/* ---------- 15. 深色区块内的格子 ---------- */
.section--ink .cell {
  background: var(--ink);
  color: var(--paper);
}

.section--ink .cell__desc,
.section--ink .cell__meta { color: rgba(245, 243, 238, .58); }

.section--ink .cell:hover {
  background: var(--paper);
  color: var(--ink);
}

.section--ink .cell:hover .cell__desc,
.section--ink .cell:hover .cell__meta { color: var(--muted); }
.section--ink .cell:hover .cell__title { color: var(--ink); }

.cta .eyebrow { color: rgba(245, 243, 238, .55); }

.footer li span {
  font-size: 13.5px;
  color: rgba(245, 243, 238, .62);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}