/**
 * @file styles.css
 * @description 煌文 · 学服溯源官网样式：暖纸底、墨蓝主色、宋体标题与档案式排版
 * @author QQQ Dev Team
 * @created 2026-11-03
 */

/* ============================================================
 * 设计 Token
 * ============================================================ */
:root {
  --paper: #f6f4ee;
  --paper-deep: #ede9df;
  --paper-light: #fffdf8;
  --ink: #101b2a;
  --ink-2: #243447;
  --ink-3: #5b6675;
  --ink-4: #7d8592;
  --line: rgba(16, 27, 42, 0.14);
  --line-soft: rgba(16, 27, 42, 0.08);
  --line-strong: rgba(16, 27, 42, 0.3);
  --blue: #2c6ba8;
  --blue-deep: #1e4e7e;
  --blue-bright: #4a90d9;
  --blue-wash: #e6eef7;
  --blue-wash-soft: #eff4fa;
  --seal: #a8453a;
  --green: #2f7d5b;

  --serif: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', 'STSong',
    'SimSun', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', 'SFMono-Regular', Consolas,
    'Liberation Mono', monospace;

  --container: 1240px;
  --header-h: 76px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

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

/* 纸面颗粒 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: 0.16;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
}

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

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

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

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

h1,
h2,
h3,
h4,
p,
dl,
dd,
dt,
figure {
  margin: 0;
}

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

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

.skip-link {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 200;
  padding: 12px 18px;
  background: var(--ink);
  color: var(--paper-light);
  font-size: 13px;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 16px;
}

.nav-open {
  overflow: hidden;
}

.btn[disabled] {
  opacity: 0.62;
  cursor: wait;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

.mono-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* ============================================================
 * 按钮与文字链接
 * ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 26px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, border-color 0.3s,
    transform 0.3s var(--ease-out);
}

.btn span {
  transition: transform 0.3s var(--ease-out);
}

.btn:hover span {
  transform: translateX(3px);
}

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

.btn-primary:hover {
  background: var(--blue);
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  border-color: var(--ink);
  background: rgba(255, 253, 248, 0.6);
}

.btn-sm {
  padding: 11px 18px;
  font-size: 13px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 1px solid rgba(44, 107, 168, 0.3);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.text-link:hover {
  color: var(--blue-deep);
  border-color: var(--blue-deep);
}

.text-link span {
  transition: transform 0.25s var(--ease-out);
}

.text-link:hover span {
  transform: translateX(4px);
}

/* ============================================================
 * 顶部导航
 * ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: background 0.35s, border-color 0.35s, height 0.35s;
}

.site-header.is-scrolled {
  background: rgba(246, 244, 238, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--blue-bright) 0%, var(--blue-deep) 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
  color: var(--paper-light);
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-text small {
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  color: var(--ink-4);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  padding: 6px 0;
  font-size: 13px;
  color: var(--ink-2);
  transition: color 0.2s;
}

.site-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease-out);
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--blue);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav .nav-cta {
  display: none;
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  margin-left: auto;
  padding: 0 8px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--ink);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}

.nav-toggle[aria-expanded='true'] span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* ============================================================
 * 首屏
 * ============================================================ */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 84px) 0 56px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(16, 27, 42, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 27, 42, 0.045) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 80% 70% at 30% 10%, #000 0%, transparent 72%);
  -webkit-mask-image:
    radial-gradient(ellipse 80% 70% at 30% 10%, #000 0%, transparent 72%);
}

.hero-glow {
  position: absolute;
  top: -18%;
  right: -6%;
  width: 62vw;
  height: 62vw;
  max-width: 880px;
  max-height: 880px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.16) 0%,
      rgba(74, 144, 217, 0.05) 42%, transparent 68%);
}

.hero-thread {
  position: absolute;
  top: 22%;
  right: 4%;
  width: 1px;
  height: 52%;
  background: repeating-linear-gradient(
    to bottom,
    rgba(44, 107, 168, 0.28) 0 9px,
    transparent 9px 20px
  );
}

.hero-thread::before,
.hero-thread::after {
  content: '';
  position: absolute;
  left: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid rgba(44, 107, 168, 0.45);
  background: var(--paper);
}

.hero-thread::before {
  top: -4px;
}

.hero-thread::after {
  bottom: -4px;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(420px, 0.94fr);
  gap: 56px;
  align-items: center;
}

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

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--blue-deep);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 0 rgba(44, 107, 168, 0.35);
  animation: pulseDot 2.6s infinite;
}

.hero h1 {
  margin: 28px 0 24px;
  font-family: var(--serif);
  font-size: clamp(3rem, 6.2vw, 5.4rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: 0.015em;
}

.hero h1 .accent {
  position: relative;
  display: inline-block;
  color: var(--blue);
}

.hero h1 .accent::after {
  content: '';
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: -0.16em;
  height: 0.1em;
  background: repeating-linear-gradient(
    90deg,
    rgba(44, 107, 168, 0.55) 0 12px,
    transparent 12px 22px
  );
  transform: scaleX(0);
  transform-origin: left;
  animation: drawLine 1.1s 0.7s var(--ease-out) forwards;
}

.hero-lead {
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--ink-3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-meta dt {
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.hero-meta dd {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-3);
}

/* 首屏档案卡 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
  padding: 20px 10px 20px 0;
}

.specimen {
  position: relative;
  width: min(100%, 432px);
  padding: 26px 26px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--blue);
  background: var(--paper-light);
  box-shadow:
    0 2px 0 rgba(16, 27, 42, 0.03),
    0 36px 70px -36px rgba(16, 27, 42, 0.42);
  transform: rotate(-1.4deg);
  transition: transform 0.6s var(--ease-out), box-shadow 0.6s var(--ease-out);
}

.hero-visual:hover .specimen {
  transform: rotate(0) translateY(-4px);
  box-shadow:
    0 2px 0 rgba(16, 27, 42, 0.03),
    0 44px 84px -38px rgba(16, 27, 42, 0.48);
}

.specimen-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.specimen-head strong {
  display: block;
  margin-top: 5px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
}

.specimen-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid rgba(47, 125, 91, 0.35);
  background: rgba(47, 125, 91, 0.06);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: var(--green);
  white-space: nowrap;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}

.specimen-status i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

.specimen.is-scanning .specimen-status {
  border-color: rgba(44, 107, 168, 0.4);
  background: rgba(44, 107, 168, 0.07);
  color: var(--blue);
}

.specimen-product {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--ink-2);
}

.specimen-product em {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 9px;
  font-style: normal;
  letter-spacing: 0.12em;
  color: var(--ink-4);
}

.barcode-wrap {
  position: relative;
  height: 62px;
  margin: 16px 0 12px;
  overflow: hidden;
  background: #f2efe7;
  border: 1px solid var(--line-soft);
}

.barcode {
  position: absolute;
  inset: 8px 14px;
  background-image:
    repeating-linear-gradient(90deg, var(--ink) 0 2px, transparent 2px 6px),
    repeating-linear-gradient(90deg, transparent 0 9px, var(--ink) 9px 12px, transparent 12px 19px),
    repeating-linear-gradient(90deg, transparent 0 21px, var(--ink) 21px 24px, transparent 24px 33px);
  opacity: 0.86;
}

.scanline {
  position: absolute;
  left: 0;
  right: 0;
  top: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
  box-shadow: 0 0 14px rgba(74, 144, 217, 0.85);
  animation: scan 3.6s ease-in-out infinite;
}

.specimen.is-scanning .scanline {
  animation-duration: 1.1s;
}

.specimen-code {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.09em;
  color: var(--ink-2);
  word-break: break-all;
}

.specimen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.specimen-grid dt {
  margin-bottom: 3px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.1em;
  color: var(--ink-4);
}

.specimen-grid dd {
  font-size: 11.5px;
  color: var(--ink-2);
}

.specimen-steps {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  margin-top: 18px;
  padding: 12px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.specimen-steps span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
}

.specimen-steps i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  border: 1px solid var(--ink-4);
}

.specimen-steps .is-done {
  color: var(--blue);
}

.specimen-steps .is-done i {
  border-color: var(--blue);
  background: var(--blue);
}

.specimen-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
}

.verify-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  background: transparent;
  font-size: 11px;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

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

.verify-icon {
  font-size: 12px;
  line-height: 1;
}

.verify-state {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.05em;
  color: var(--ink-4);
  text-align: right;
}

.specimen.is-verified .specimen-status {
  border-color: rgba(47, 125, 91, 0.5);
  background: rgba(47, 125, 91, 0.1);
  color: var(--green);
}

.specimen-seal {
  position: absolute;
  right: -18px;
  bottom: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 82px;
  height: 82px;
  border: 2px solid rgba(168, 69, 58, 0.72);
  border-radius: 50%;
  background: rgba(255, 253, 248, 0.82);
  color: var(--seal);
  font-family: var(--serif);
  transform: scale(0.7) rotate(-8deg);
  opacity: 0;
  transition: transform 0.5s var(--ease-out), opacity 0.4s;
  pointer-events: none;
}

.specimen-seal span {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.specimen-seal small {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.16em;
}

.specimen.is-verified .specimen-seal {
  transform: scale(1) rotate(-12deg);
  opacity: 1;
}

.specimen-tag {
  position: absolute;
  z-index: 3;
  padding: 7px 11px;
  border: 1px dashed rgba(44, 107, 168, 0.45);
  background: var(--blue-wash);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--blue-deep);
  white-space: nowrap;
}

.specimen-tag-top {
  top: 2px;
  left: -6px;
  transform: rotate(-3deg);
}

.specimen-tag-bottom {
  right: 16px;
  bottom: -2px;
  transform: rotate(2.5deg);
  background: var(--paper);
}

.hero-stitch {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 64px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
}

.hero-stitch i {
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--line-strong) 0 8px,
    transparent 8px 17px
  );
}

/* ============================================================
 * 数据条
 * ============================================================ */
.ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.55);
}

.ticker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.ticker-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 30px 28px;
  border-left: 1px solid var(--line-soft);
}

.ticker-item:first-child {
  border-left: 0;
  padding-left: 0;
}

.ticker-item strong {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  color: var(--blue);
}

.ticker-item span {
  font-size: 12px;
  color: var(--ink-3);
}

/* ============================================================
 * 区块通用
 * ============================================================ */
.section {
  position: relative;
  padding: clamp(72px, 8.2vw, 112px) 0;
}

.section-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(40px, 5vw, 60px);
  max-width: 940px;
}

/* 编号改为横向小标签，与标题、正文共用同一条左轴线 */
.section-index {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 0;
  border: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
  line-height: 1.4;
}

.section-index span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 17px;
  padding: 0 5px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 9.5px;
  line-height: 1;
  color: var(--blue);
  letter-spacing: 0;
}

.section-title h2 {
  font-family: var(--serif);
  font-size: clamp(1.95rem, 3.25vw, 2.95rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.section-lede {
  max-width: 56ch;
  padding-bottom: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-3);
}

/* ============================================================
 * 01 溯源之问
 * ============================================================ */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.pain-card {
  position: relative;
  min-height: 236px;
  padding: 36px 40px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.42);
  transition: background 0.35s, transform 0.35s var(--ease-out);
}

.pain-card:hover {
  background: var(--paper-light);
  transform: translateY(-3px);
}

.pain-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.pain-card h3 {
  margin: 16px 0 10px;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.pain-card p {
  max-width: 30em;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--ink-3);
}

.pain-tag {
  position: absolute;
  right: 32px;
  bottom: 28px;
  padding: 4px 9px;
  border: 1px dashed var(--line-strong);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--ink-4);
}

.policy-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 56px;
  border: 1px solid rgba(44, 107, 168, 0.24);
  background: var(--blue-wash);
}

.policy-item {
  padding: 22px 24px;
  border-left: 1px solid rgba(44, 107, 168, 0.18);
}

.policy-item:first-child {
  border-left: 0;
}

.policy-item span {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.policy-item p {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ============================================================
 * 02 平台能力
 * ============================================================ */
.cap-list {
  border-top: 1px solid var(--line);
}

.cap-row {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.12fr) 36px;
  gap: 32px;
  align-items: start;
  margin: 0 -24px;
  padding: 34px 24px;
  border-bottom: 1px solid var(--line);
  transition: background 0.4s, color 0.4s;
}

.cap-num {
  padding-top: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--blue);
  transition: color 0.4s;
}

.cap-title h3 {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.cap-title p {
  margin-top: 10px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-3);
  transition: color 0.4s;
}

.cap-detail {
  padding-left: 32px;
  border-left: 1px solid var(--line);
  transition: border-color 0.4s;
}

.cap-detail > p {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--ink-3);
  transition: color 0.4s;
}

.cap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.cap-tags li {
  padding: 4px 9px;
  border: 1px dashed var(--line-strong);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
  transition: color 0.4s, border-color 0.4s;
}

.cap-arrow {
  justify-self: end;
  font-size: 16px;
  color: var(--ink-4);
  transition: color 0.4s, transform 0.4s var(--ease-out);
}

.cap-row:hover {
  background: var(--ink);
  color: var(--paper-light);
}

.cap-row:hover .cap-num,
.cap-row:hover .cap-arrow {
  color: var(--blue-bright);
}

.cap-row:hover .cap-title p,
.cap-row:hover .cap-detail > p {
  color: rgba(246, 244, 238, 0.72);
}

.cap-row:hover .cap-detail {
  border-color: rgba(246, 244, 238, 0.2);
}

.cap-row:hover .cap-tags li {
  color: rgba(246, 244, 238, 0.78);
  border-color: rgba(246, 244, 238, 0.35);
}

.cap-row:hover .cap-arrow {
  transform: translate(3px, -3px);
}

/* ============================================================
 * 03 全链路
 * ============================================================ */
.chain {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-deep);
}

.chain-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 96px;
  align-items: start;
}

.chain-list {
  position: relative;
  padding-left: 44px;
}

.chain-list::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 36px;
  left: -36px;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--line-strong) 0 8px,
    transparent 8px 18px
  );
}

.chain-item {
  position: relative;
  padding-bottom: 42px;
}

.chain-item:last-child {
  padding-bottom: 0;
}

.chain-dot {
  position: absolute;
  top: 3px;
  left: -44px;
  width: 17px;
  height: 17px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--paper-deep);
  transition: border-color 0.4s, box-shadow 0.4s;
}

.chain-dot::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--blue);
  transform: scale(0);
  transition: transform 0.4s var(--ease-out);
}

.chain-item.is-visible .chain-dot {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(44, 107, 168, 0.1);
}

.chain-item.is-visible .chain-dot::after {
  transform: scale(1);
}

.chain-step {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.chain-content h3 {
  margin: 8px 0 8px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.chain-content p {
  max-width: 34em;
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-3);
}

.chain-chip {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 9px;
  border: 1px dashed var(--line-strong);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
}

.chain-aside {
  position: sticky;
  top: 120px;
  padding: 32px 28px 30px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.55);
}

.chain-big {
  display: block;
  font-family: var(--serif);
  font-size: 88px;
  font-weight: 600;
  line-height: 0.9;
  color: var(--blue);
  opacity: 0.9;
}

.chain-aside h3 {
  margin: 18px 0 12px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
}

.chain-aside p {
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--ink-3);
}

.chain-aside .text-link {
  margin-top: 22px;
}

/* ============================================================
 * 04 六端协同
 * ============================================================ */
.terminals {
  background-color: var(--blue-wash-soft);
  background-image:
    linear-gradient(to right, rgba(44, 107, 168, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 107, 168, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
}

.terminal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.terminal-card {
  position: relative;
  min-height: 252px;
  padding: 28px 28px 34px;
  border: 1px solid rgba(16, 27, 42, 0.12);
  background: rgba(255, 253, 248, 0.82);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s,
    border-color 0.4s, background 0.4s;
}

.terminal-card:hover {
  transform: translateY(-6px);
  border-color: rgba(44, 107, 168, 0.45);
  background: var(--paper-light);
  box-shadow: 0 24px 48px -28px rgba(16, 27, 42, 0.36);
}

.terminal-code {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--blue);
}

.terminal-num {
  position: absolute;
  top: 28px;
  right: 28px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--ink-4);
}

.terminal-card h3 {
  margin: 34px 0 10px;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.terminal-card p {
  max-width: 26em;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--ink-3);
}

.terminal-line {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 24px;
  height: 1px;
  background: var(--line-soft);
  overflow: hidden;
}

.terminal-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}

.terminal-card:hover .terminal-line::after {
  transform: scaleX(1);
}

/* ============================================================
 * 05 合规与安全
 * ============================================================ */
.trust {
  overflow: hidden;
  background: #0c1725;
  color: #f1eee6;
}

.trust::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 60% 20%, #000 0%, transparent 78%);
  -webkit-mask-image:
    radial-gradient(ellipse 80% 70% at 60% 20%, #000 0%, transparent 78%);
}

.trust::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 52vw;
  height: 52vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(44, 107, 168, 0.28) 0%, transparent 66%);
  pointer-events: none;
}

.trust .container {
  position: relative;
  z-index: 2;
}

.trust .section-index {
  border-color: rgba(255, 255, 255, 0.24);
  color: rgba(241, 238, 230, 0.5);
}

.trust .section-index span {
  color: var(--blue-bright);
}

.trust .section-title h2 {
  color: #f4f1e8;
}

.trust .section-lede {
  color: rgba(241, 238, 230, 0.65);
}

.trust-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 80px;
  align-items: start;
}

.pillar {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  padding: 28px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.pillar:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.pillar-num {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--blue-bright);
}

.pillar h3 {
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.pillar p {
  max-width: 38em;
  font-size: 12.5px;
  line-height: 1.85;
  color: rgba(241, 238, 230, 0.62);
}

.hash-panel {
  position: relative;
  padding: 30px 30px 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.03);
}

.hash-title {
  display: block;
  margin-bottom: 22px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--blue-bright);
}

.hash-chain {
  position: relative;
  padding-left: 22px;
}

.hash-chain::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 4px;
  width: 1px;
  background: rgba(74, 144, 217, 0.35);
}

.hash-node {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.14);
}

.hash-node:last-child {
  border-bottom: 0;
}

.hash-node::before {
  content: '';
  position: absolute;
  top: 22px;
  left: -22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue-bright);
  box-shadow: 0 0 0 0 rgba(74, 144, 217, 0.5);
  animation: chainPulse 3.6s infinite;
}

.hash-node:nth-child(2)::before {
  animation-delay: 0.9s;
}

.hash-node:nth-child(3)::before {
  animation-delay: 1.8s;
}

.hash-node:nth-child(4)::before {
  animation-delay: 2.7s;
}

.hash-node span {
  font-size: 12px;
  color: rgba(241, 238, 230, 0.72);
}

.hash-node code {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: #8fb6da;
}

.hash-seal {
  position: absolute;
  right: 22px;
  bottom: 18px;
  padding: 6px 10px;
  border: 1px solid rgba(74, 144, 217, 0.45);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.18em;
  color: #8fb6da;
  transform: rotate(-7deg);
}

.standard-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 56px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.standard-list li {
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: rgba(241, 238, 230, 0.62);
}

/* ============================================================
 * 06 关于我们
 * ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 88px;
  align-items: start;
}

.about-lead {
  max-width: 30em;
  padding-left: 24px;
  border-left: 2px solid var(--blue);
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

.about-story > p:not(.about-lead) {
  max-width: 34em;
  margin-top: 26px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-3);
}

.about-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.about-figures div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-figures strong {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 600;
  line-height: 1;
  color: var(--blue);
}

.about-figures span {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
}

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

.milestones li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.mile-date {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.milestones strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.milestones p {
  margin-top: 5px;
  font-size: 12px;
  line-height: 1.8;
  color: var(--ink-3);
}

/* ============================================================
 * 07 预约演示
 * ============================================================ */
.contact {
  overflow: hidden;
  background: #153b5c;
  color: #f4f1e8;
}

.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 90% at 20% 20%, #000 0%, transparent 76%);
  -webkit-mask-image:
    radial-gradient(ellipse 80% 90% at 20% 20%, #000 0%, transparent 76%);
}

.contact::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.22) 0%, transparent 66%);
  pointer-events: none;
}

.contact .container {
  position: relative;
  z-index: 2;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: 80px;
  align-items: start;
}

.contact-index {
  margin-bottom: 14px;
  border-color: rgba(255, 255, 255, 0.24);
  color: rgba(244, 241, 232, 0.5);
}

.contact-index span {
  color: #8fb6da;
}

.contact-copy h2 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4.2vw, 3.6rem);
  font-weight: 600;
  line-height: 1.26;
  letter-spacing: 0.01em;
  color: #f4f1e8;
}

.contact-lede {
  max-width: 30em;
  margin-top: 24px;
  font-size: 14px;
  line-height: 1.95;
  color: rgba(244, 241, 232, 0.7);
}

.contact-channels {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-channel span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: #8fb6da;
}

.contact-channel a,
.contact-channel p {
  font-size: 13px;
  color: rgba(244, 241, 232, 0.86);
}

.contact-hint {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-hint span {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: #8fb6da;
}

.contact-hint p {
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.66);
}

.contact-form-wrap {
  background: var(--paper-light);
  color: var(--ink);
  box-shadow: 0 40px 80px -40px rgba(6, 18, 32, 0.55);
}

.demo-form {
  padding: 38px 38px 34px;
}

.form-head .mono-label {
  color: var(--blue);
}

.form-head h3 {
  margin: 8px 0 6px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.form-head p {
  font-size: 12.5px;
  color: var(--ink-3);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 16px;
  margin-top: 26px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.field label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink-2);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: #f7f5ef;
  font-size: 13.5px;
  line-height: 1.6;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--ink-4);
  opacity: 0.85;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--line-strong);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(44, 107, 168, 0.12);
}

.field textarea {
  resize: vertical;
  min-height: 84px;
}

.field.has-error input,
.field.has-error select {
  border-color: var(--seal);
  background: rgba(168, 69, 58, 0.04);
}

.field-error {
  min-height: 14px;
  font-size: 10.5px;
  line-height: 1.4;
  color: var(--seal);
}

.field select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 34px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%235b6675' stroke-width='1.2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
}

.form-submit {
  width: 100%;
  margin-top: 22px;
}

.form-note {
  margin-top: 12px;
  font-size: 10.5px;
  line-height: 1.7;
  color: var(--ink-4);
  text-align: center;
}

.form-result {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}

.result-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: rgba(47, 125, 91, 0.1);
  color: var(--green);
  font-size: 15px;
}

.form-result h4 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
}

.form-result > p {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

.result-summary {
  max-height: 190px;
  margin: 14px 0 0;
  padding: 12px 14px;
  overflow: auto;
  border: 1px solid var(--line);
  background: #f7f5ef;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--ink-2);
  white-space: pre-wrap;
}

.result-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 16px;
}

.demo-form.is-submitted .form-grid,
.demo-form.is-submitted .form-submit,
.demo-form.is-submitted .form-note {
  display: none;
}

/* ============================================================
 * 页脚
 * ============================================================ */
.site-footer {
  padding: 64px 0 28px;
  background: #0a1420;
  color: rgba(246, 244, 238, 0.66);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.9fr 1fr 1fr 1fr;
  gap: 44px;
}

.brand-light .brand-text strong {
  color: var(--paper-light);
}

.brand-light .brand-text small {
  color: rgba(246, 244, 238, 0.45);
}

.footer-brand p {
  margin-top: 18px;
  font-size: 12.5px;
  line-height: 1.9;
}

.footer-col h3 {
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: rgba(246, 244, 238, 0.42);
}

.footer-col a {
  display: block;
  margin-bottom: 10px;
  font-size: 12.5px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--paper-light);
}

.footer-note {
  margin-top: 10px;
  font-size: 11.5px;
  line-height: 1.8;
  color: rgba(246, 244, 238, 0.42);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(246, 244, 238, 0.12);
}

.footer-bottom p {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: rgba(246, 244, 238, 0.42);
}

.footer-legal a {
  color: rgba(246, 244, 238, 0.62);
  border-bottom: 1px solid rgba(246, 244, 238, 0.18);
  transition: color 0.2s, border-color 0.2s;
}

.footer-legal a:hover {
  color: var(--paper-light);
  border-color: rgba(246, 244, 238, 0.5);
}

/* ============================================================
 * 入场动效
 * ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes pulseDot {
  0% {
    box-shadow: 0 0 0 0 rgba(44, 107, 168, 0.35);
  }
  60% {
    box-shadow: 0 0 0 9px rgba(44, 107, 168, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(44, 107, 168, 0);
  }
}

@keyframes drawLine {
  to {
    transform: scaleX(1);
  }
}

@keyframes scan {
  0% {
    top: 8%;
  }
  50% {
    top: 88%;
  }
  100% {
    top: 8%;
  }
}

@keyframes chainPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(74, 144, 217, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(74, 144, 217, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(74, 144, 217, 0);
  }
}

/* ============================================================
 * 响应式
 * ============================================================ */
@media (max-width: 1180px) {
  .container {
    padding: 0 32px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(390px, 0.9fr);
    gap: 36px;
  }

  .section-head {
    grid-template-columns: 96px minmax(0, 1fr) minmax(260px, 320px);
    gap: 30px;
  }

  .cap-row {
    grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1fr) 30px;
    gap: 24px;
  }

  .chain-grid {
    gap: 64px;
  }

  .trust-grid {
    gap: 56px;
  }

  .about-grid {
    gap: 56px;
  }

  .contact-grid {
    gap: 56px;
  }
}

@media (max-width: 1024px) {
  .site-nav {
    gap: 20px;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding-top: calc(var(--header-h) + 64px);
  }

  .hero h1 {
    font-size: clamp(2.7rem, 6.2vw, 4.4rem);
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(350px, 0.86fr);
  }

  .specimen-tag-top {
    left: 0;
  }

  .ticker-item {
    padding: 26px 20px;
  }

  .ticker-item strong {
    font-size: 34px;
  }

  .section-head {
    grid-template-columns: 80px minmax(0, 1fr);
    row-gap: 18px;
  }

  .section-lede {
    grid-column: 2;
    max-width: 44em;
  }

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

  .about-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }

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

  .chain-aside {
    position: static;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0 24px;
    align-items: center;
    max-width: 560px;
    margin-top: 12px;
  }

  .chain-big {
    grid-row: 1 / 3;
    font-size: 72px;
  }

  .chain-aside h3 {
    margin-top: 0;
  }

  .chain-aside p,
  .chain-aside .text-link {
    grid-column: 2;
  }

  .chain-aside p {
    margin-bottom: 10px;
  }

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

  .contact-form-wrap {
    max-width: 640px;
  }
}

@media (max-width: 860px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 90;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 24px;
    border-bottom: 1px solid var(--line);
    background: rgba(246, 244, 238, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.35s var(--ease-out), opacity 0.3s,
      visibility 0.3s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav a {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--line-soft);
    font-size: 14px;
  }

  .site-nav a::after {
    display: none;
  }

  .site-nav .nav-cta {
    display: inline-flex;
    justify-content: center;
    margin-top: 16px;
    padding: 13px 18px;
    border: 0;
    background: var(--ink);
    color: var(--paper-light);
  }

  .nav-toggle {
    display: flex;
  }

  .header-inner {
    gap: 16px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .hero-copy {
    max-width: 640px;
  }

  .hero-visual {
    justify-content: flex-start;
    padding-left: 6px;
  }

  .specimen {
    transform: rotate(-1deg);
  }

  .hero-thread {
    display: none;
  }

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

  .ticker-item:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }

  .ticker-item:nth-child(n + 3) {
    border-top: 1px solid var(--line-soft);
  }

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

  .policy-band {
    grid-template-columns: 1fr 1fr;
  }

  .policy-item:nth-child(odd) {
    border-left: 0;
  }

  .policy-item:nth-child(n + 3) {
    border-top: 1px solid rgba(44, 107, 168, 0.18);
  }

  .cap-row {
    grid-template-columns: 40px minmax(0, 1fr) 24px;
    gap: 16px 18px;
    margin: 0 -16px;
    padding: 28px 16px;
  }

  .cap-detail {
    grid-column: 2 / 3;
    padding-left: 0;
    border-left: 0;
  }

  .cap-arrow {
    grid-column: 3;
    grid-row: 1;
  }

  .about-figures {
    gap: 32px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }

  :root {
    --header-h: 64px;
  }

  .brand-text strong {
    font-size: 14.5px;
  }

  .hero {
    padding-top: calc(var(--header-h) + 48px);
    padding-bottom: 36px;
  }

  .hero h1 {
    margin-top: 22px;
    font-size: clamp(2.35rem, 10vw, 3.1rem);
  }

  .hero-lead {
    font-size: 14px;
    line-height: 1.9;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-top: 28px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-meta {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 36px;
  }

  .hero-meta div {
    display: flex;
    align-items: baseline;
    gap: 12px;
  }

  .hero-meta dt {
    flex: 0 0 82px;
    margin-bottom: 0;
  }

  .hero-meta dd {
    font-size: 11.5px;
  }

  .hero-visual {
    padding: 0;
  }

  .specimen {
    width: 100%;
    padding: 22px 20px 18px;
    transform: none;
  }

  .specimen-tag {
    display: none;
  }

  .specimen-seal {
    right: 6px;
    bottom: 64px;
    width: 66px;
    height: 66px;
  }

  .specimen-seal span {
    font-size: 13px;
  }

  .specimen-code {
    font-size: 10px;
  }

  .specimen-foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .verify-state {
    text-align: left;
  }

  .hero-stitch {
    margin-top: 40px;
    font-size: 7.5px;
  }

  .hero-stitch span:last-child {
    display: none;
  }

  .ticker-item {
    padding: 22px 14px;
  }

  .ticker-item strong {
    font-size: 28px;
  }

  .ticker-item span {
    font-size: 11px;
  }

  .section {
    padding: 72px 0;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 40px;
  }

  .section-index {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    border-left: 0;
    padding-left: 0;
  }

  .section-index::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--line-strong);
    align-self: center;
  }

  .section-title h2 {
    font-size: clamp(1.8rem, 8.4vw, 2.3rem);
  }

  .section-lede {
    grid-column: 1;
    font-size: 13px;
  }

  .pain-card {
    min-height: 0;
    padding: 28px 24px 30px;
  }

  .pain-tag {
    position: static;
    display: inline-block;
    margin-top: 16px;
  }

  .policy-band {
    grid-template-columns: 1fr;
  }

  .policy-item {
    border-left: 0;
    border-top: 1px solid rgba(44, 107, 168, 0.18);
    padding: 18px 20px;
  }

  .policy-item:first-child {
    border-top: 0;
  }

  .cap-row {
    grid-template-columns: 28px minmax(0, 1fr);
    margin: 0;
    padding: 24px 0;
  }

  .cap-title h3 {
    font-size: 21px;
  }

  .cap-detail {
    grid-column: 2;
  }

  .cap-arrow {
    display: none;
  }

  .chain-list {
    padding-left: 34px;
  }

  .chain-dot {
    left: -34px;
    width: 15px;
    height: 15px;
  }

  .chain-list::before {
    left: -27px;
  }

  .chain-item {
    padding-bottom: 34px;
  }

  .chain-content h3 {
    font-size: 19px;
  }

  .chain-aside {
    display: block;
  }

  .chain-big {
    font-size: 56px;
  }

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

  .terminal-card {
    min-height: 220px;
  }

  .trust-grid {
    gap: 36px;
  }

  .pillar {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 24px 0;
  }

  .hash-panel {
    padding: 24px 20px 30px;
  }

  .hash-node {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .standard-list {
    margin-top: 36px;
  }

  .about-lead {
    font-size: 19px;
    padding-left: 16px;
  }

  .about-figures {
    gap: 24px;
  }

  .about-figures strong {
    font-size: 30px;
  }

  .milestones li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .contact-grid {
    gap: 36px;
  }

  .contact-copy h2 {
    font-size: clamp(1.9rem, 8.4vw, 2.4rem);
  }

  .demo-form {
    padding: 26px 20px 24px;
  }

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

  .form-result {
    margin-top: 18px;
  }

  .result-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 380px) {
  .specimen-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .specimen-steps span {
    font-size: 8px;
  }
}

/* ============================================================
 * 动效降级
 * ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .hero h1 .accent::after {
    transform: scaleX(1);
  }
}