/* ============================================================
   杭州思普瑞网络科技有限公司官网 · 全站样式
   设计基调：纸感暖白底 / 墨黑文字 / 细线分栏 / 克制的墨绿强调
   产品区块各自带入所属产品的品牌色，公司层保持中性。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 纸面与文字 */
  --paper: #f7f5f1;
  --paper-soft: #efebe4;
  --card: #ffffff;
  --ink: #1a1917;
  --ink-2: #5e5a52;
  --ink-3: #8f8a80;
  --line: #e3ddd2;
  --line-2: #d5cec1;

  /* 深色收尾区 */
  --deep: #141311;
  --deep-2: #1d1b18;
  --deep-line: rgba(245, 242, 236, 0.12);
  --on-deep: #f5f2ec;
  --on-deep-2: rgba(245, 242, 236, 0.64);

  /* 公司强调色：墨绿 */
  --brand: #1e4a3c;
  --brand-2: #163a2f;
  --brand-soft: #e8efea;

  /* 产品色：爪呗 */
  --pawpay: #f0687a;
  --pawpay-2: #cf4969;
  --pawpay-soft: #fdeef1;

  /* 产品色：源犬 */
  --srcdog: #c8462c;
  --srcdog-2: #a53a23;
  --srcdog-soft: #fbede7;

  /* 尺寸 */
  --container: 1160px;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --header-h: 72px;

  /* 字体 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI",
    sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 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;
  font: 15px/1.75 var(--font);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-locked {
  overflow: hidden;
}
h1,
h2,
h3,
h4,
p,
figure,
blockquote {
  margin: 0;
}
h1,
h2,
h3,
h4 {
  font-weight: 650;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
h1 {
  font-size: clamp(36px, 5.2vw, 62px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}
h2 {
  font-size: clamp(25px, 3.1vw, 38px);
  letter-spacing: -0.028em;
}
h3 {
  font-size: 19px;
}
img,
svg {
  display: block;
  max-width: 100%;
}
img {
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 4px;
  border-radius: 4px;
}
[hidden] {
  display: none !important;
}
::selection {
  background: var(--brand);
  color: #fff;
}

/* ---------- 版式与容器 ---------- */
.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  left: 20px;
  top: -70px;
  z-index: 300;
  padding: 10px 20px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 14px;
}
.section {
  padding: clamp(72px, 9vw, 128px) 0;
}
.section-soft {
  background: var(--paper-soft);
}
.section-deep {
  background: var(--deep);
  color: var(--on-deep);
}
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  gap: 32px 56px;
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 64px);
}
.section-head > p {
  color: var(--ink-2);
  font-size: 15px;
}
.section-deep .section-head > p {
  color: var(--on-deep-2);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  flex: none;
}
.eyebrow-plain {
  letter-spacing: 0.1em;
}
.section-deep .eyebrow {
  color: rgba(245, 242, 236, 0.6);
}
.lead {
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.85;
}
.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* ---------- 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease,
    color 0.18s ease, transform 0.18s ease;
}
.btn svg {
  flex: none;
  transition: transform 0.24s var(--ease);
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover {
  background: var(--brand-2);
}
.btn-primary:hover svg {
  transform: translateX(3px);
}
.btn-ghost {
  border-color: var(--line-2);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--ink);
}
.btn-ghost-light {
  border-color: var(--deep-line);
  color: var(--on-deep);
}
.btn-ghost-light:hover {
  border-color: rgba(245, 242, 236, 0.5);
}
.btn-sm {
  min-height: 40px;
  padding: 8px 20px;
  font-size: 13.5px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
}
.text-link svg {
  transition: transform 0.24s var(--ease);
}
.text-link:hover svg {
  transform: translateX(4px);
}

/* ---------- 站点头部 ---------- */
.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
  transition: background 0.24s ease, border-color 0.24s ease,
    box-shadow 0.24s ease;
}
.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(247, 245, 241, 0.9);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom-color: var(--line);
}
.site-header.is-scrolled {
  box-shadow: 0 1px 20px rgba(26, 25, 23, 0.05);
}
.nav {
  display: flex;
  align-items: center;
  gap: 40px;
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}
.brand-mark {
  width: 32px;
  height: 32px;
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1;
}
.brand-cn {
  font-size: 16.5px;
  font-weight: 650;
  letter-spacing: 0.06em;
}
.brand-en {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  color: var(--ink-3);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-left: auto;
}
.site-nav a {
  position: relative;
  padding: 6px 0;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color 0.18s ease;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1.5px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s var(--ease);
}
.site-nav a:hover {
  color: var(--ink);
}
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}
.site-nav a[aria-current="page"] {
  color: var(--ink);
}
.nav-action {
  flex: none;
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  padding: 11px;
  border-radius: var(--radius-sm);
}
.menu-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.24s var(--ease), opacity 0.18s ease;
}
.menu-toggle span + span {
  margin-top: 5px;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(64px, 10vw, 122px)) 0 0;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line) 0 1px,
    transparent 1px 108px
  );
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(
    180deg,
    transparent,
    #000 22%,
    #000 62%,
    transparent
  );
  mask-image: linear-gradient(
    180deg,
    transparent,
    #000 22%,
    #000 62%,
    transparent
  );
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse 70% 50% at 82% 8%,
      rgba(30, 74, 60, 0.07),
      transparent 62%
    ),
    radial-gradient(
      ellipse 55% 42% at 6% 34%,
      rgba(240, 104, 122, 0.07),
      transparent 60%
    );
  pointer-events: none;
}
.hero > .container {
  position: relative;
  z-index: 1;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.58fr);
  gap: 32px 64px;
  align-items: end;
  padding-bottom: clamp(56px, 7vw, 88px);
}
.hero h1 {
  margin-bottom: 28px;
}
.hero h1 em {
  font-style: normal;
  color: var(--brand);
}
.hero-lead {
  max-width: 46ch;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.85;
}
.hero-side {
  padding-bottom: 4px;
}
.fact-list > div {
  display: grid;
  grid-template-columns: minmax(0, 4.5ch) minmax(0, 1fr);
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.fact-list > div:first-child {
  padding-top: 0;
}
.fact-list dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}
.fact-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

/* 首屏下方的产品索引条：细线分隔的两行入口 */
.product-index {
  border-top: 1px solid var(--line);
}
.product-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 15ch) minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px 28px;
  padding: 26px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease, padding 0.24s var(--ease);
}
.product-row:hover {
  background: rgba(255, 255, 255, 0.72);
  padding-inline: 16px 8px;
}
.product-row-logo {
  height: 34px;
  width: auto;
  max-width: 44px;
  object-fit: contain;
}
.product-row-name {
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.product-row-name small {
  display: block;
  margin-top: 3px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--ink-3);
}
.product-row-desc {
  color: var(--ink-2);
  font-size: 14.5px;
}
.product-row-arrow {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink-2);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease,
    transform 0.24s var(--ease);
}
.product-row:hover .product-row-arrow {
  transform: translateX(4px);
}
.product-row[data-product="pawpay"]:hover .product-row-arrow {
  background: var(--pawpay);
  border-color: var(--pawpay);
  color: #fff;
}
.product-row[data-product="srcdog"]:hover .product-row-arrow {
  background: var(--srcdog);
  border-color: var(--srcdog);
  color: #fff;
}

/* ---------- 产品大卡 ---------- */
.product-card {
  padding: clamp(28px, 3.4vw, 44px);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 2px rgba(26, 25, 23, 0.03);
}
.product-card + .product-card {
  margin-top: 28px;
}
.product-card[data-product="pawpay"] {
  --accent: var(--pawpay);
  --accent-2: var(--pawpay-2);
  --accent-soft: var(--pawpay-soft);
}
.product-card[data-product="srcdog"] {
  --accent: var(--srcdog);
  --accent-2: var(--srcdog-2);
  --accent-soft: var(--srcdog-soft);
}
.product-tag {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.product-logo {
  height: 34px;
  width: auto;
  max-width: 44px;
  object-fit: contain;
}
.product-id b {
  display: block;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.02em;
}
.product-id small {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
}
.product-no {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}
.product-card h3 {
  font-size: clamp(24px, 2.6vw, 31px);
  letter-spacing: -0.03em;
}
.product-card .product-sub {
  margin-top: 10px;
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 600;
}
.product-card .product-desc {
  margin-top: 20px;
  max-width: 78ch;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.85;
}
.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 3.4vw, 52px);
  align-items: start;
  margin-top: clamp(28px, 3.2vw, 40px);
}
.point-list {
  border-top: 1px solid var(--line);
}
.point-list li {
  display: grid;
  grid-template-columns: minmax(0, 8.5ch) minmax(0, 1fr);
  gap: 8px 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.point-list b {
  font-weight: 650;
}
.point-list span {
  color: var(--ink-2);
}
.product-card .actions {
  margin-top: 30px;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--accent-2);
}
.product-shot {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}
.product-shot img {
  width: 100%;
}
.shot-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.shot-dots {
  display: inline-flex;
  gap: 5px;
  flex: none;
}
.shot-dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line-2);
}
.shot-bar b {
  font-weight: 600;
}
.shot-bar small {
  margin-left: auto;
  color: var(--ink-3);
  font-size: 12px;
}

/* ---------- 做法列表 ---------- */
.practice {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-2);
}
.practice li {
  padding: 34px 34px 34px 0;
  border-right: 1px solid var(--line-2);
}
.practice li:last-child {
  border-right: 0;
  padding-right: 0;
}
.practice li:not(:first-child) {
  padding-left: 34px;
}
.practice-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brand);
}
.practice h3 {
  margin: 16px 0 12px;
  font-size: 20px;
}
.practice p {
  color: var(--ink-2);
  font-size: 14.5px;
}

/* ---------- 数据区 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--deep-line);
}
.stat {
  padding: 34px 30px 34px 0;
  border-right: 1px solid var(--deep-line);
}
.stat:last-child {
  border-right: 0;
}
.stat:not(:first-child) {
  padding-left: 30px;
}
.stat-value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--on-deep);
}
.stat-value em {
  font-style: normal;
  font-size: 0.44em;
  letter-spacing: 0;
  color: var(--on-deep-2);
}
.stat-label {
  margin-top: 14px;
  font-size: 14.5px;
  font-weight: 600;
}
.stat-note {
  margin-top: 6px;
  color: var(--on-deep-2);
  font-size: 13px;
  line-height: 1.7;
}
.stat-foot {
  margin-top: 32px;
  color: rgba(245, 242, 236, 0.42);
  font-size: 12.5px;
}

/* ---------- 联系收尾区 ---------- */
.closing-block {
  margin-top: clamp(64px, 8vw, 108px);
  padding-top: clamp(48px, 6vw, 76px);
  border-top: 1px solid var(--deep-line);
}
.closing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 32px 64px;
  align-items: end;
}
.closing-grid h2 {
  margin-bottom: 22px;
}
.closing-grid > div > p {
  max-width: 44ch;
  color: var(--on-deep-2);
  font-size: 15.5px;
  line-height: 1.85;
}
.contact-list {
  border-top: 1px solid var(--deep-line);
}
.contact-list li {
  display: grid;
  grid-template-columns: minmax(0, 6.5ch) minmax(0, 1fr);
  gap: 20px;
  padding: 15px 0;
  border-bottom: 1px solid var(--deep-line);
  font-size: 14.5px;
}
.contact-list dt,
.contact-list b {
  color: var(--on-deep-2);
  font-weight: 500;
}
.contact-list a {
  color: var(--on-deep);
  border-bottom: 1px solid var(--deep-line);
  transition: border-color 0.2s ease;
}
.contact-list a:hover {
  border-bottom-color: var(--on-deep);
}

/* ---------- 站内页首屏 ---------- */
.page-hero {
  padding: calc(var(--header-h) + clamp(48px, 7vw, 88px)) 0 clamp(40px, 5vw, 60px);
}
.page-hero-inner {
  display: flex;
  align-items: flex-end;
  gap: 28px;
  flex-wrap: wrap;
}
.page-hero-inner img {
  height: 46px;
  width: auto;
  object-fit: contain;
}
.page-hero h1 {
  margin-bottom: 22px;
}
.page-hero .lead {
  max-width: 58ch;
}
.page-hero .actions {
  margin-top: 30px;
}
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.anchor-nav a {
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink-2);
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}
.anchor-nav a:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: var(--card);
}

/* ---------- 详情区块 ---------- */
.detail {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(32px, 4.5vw, 60px);
  align-items: center;
}
.detail + .detail {
  margin-top: clamp(64px, 8vw, 104px);
}
.detail.is-reversed .detail-text {
  order: 2;
}
.detail h2 {
  margin-bottom: 18px;
}
.detail .lead {
  max-width: 46ch;
}
.benefits {
  margin-top: 26px;
  border-top: 1px solid var(--line);
}
.benefits li {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.benefits b {
  display: block;
  margin-bottom: 4px;
  font-weight: 650;
}
.benefits span {
  color: var(--ink-2);
}

/* ---------- 通用卡片网格 ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.card {
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.28s var(--ease),
    box-shadow 0.28s var(--ease);
}
.card:hover {
  border-color: var(--line-2);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(26, 25, 23, 0.06);
}
.card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}
.card p {
  color: var(--ink-2);
  font-size: 14.5px;
}
.card-index {
  display: block;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
}
.card[data-product="pawpay"] .card-index {
  color: var(--pawpay-2);
}
.card[data-product="srcdog"] .card-index {
  color: var(--srcdog-2);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.tag-list span {
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-2);
}

/* ---------- 步骤条 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-2);
}
.steps li {
  padding: 30px 28px 30px 0;
  border-right: 1px solid var(--line-2);
}
.steps li:last-child {
  border-right: 0;
  padding-right: 0;
}
.steps li:not(:first-child) {
  padding-left: 28px;
}
.step-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brand);
}
.steps h3 {
  margin: 14px 0 10px;
  font-size: 18px;
}
.steps p {
  color: var(--ink-2);
  font-size: 14px;
}

/* ---------- 时间线 ---------- */
.timeline {
  border-top: 1px solid var(--line-2);
}
.timeline li {
  display: grid;
  grid-template-columns: minmax(0, 8ch) minmax(0, 1fr);
  gap: 12px 40px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-2);
}
.timeline-year {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--brand);
}
.timeline h3 {
  margin-bottom: 8px;
  font-size: 18px;
}
.timeline p {
  max-width: 68ch;
  color: var(--ink-2);
  font-size: 14.5px;
}

/* ---------- 图片放大对话框 ---------- */
.shot-link {
  position: relative;
  display: block;
  cursor: zoom-in;
}
.shot-link .zoom-hint {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(20, 19, 17, 0.72);
  color: #fff;
  font-size: 12px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.24s var(--ease);
}
.shot-link:hover .zoom-hint,
.shot-link:focus-visible .zoom-hint {
  opacity: 1;
  transform: translateY(0);
}
.image-dialog {
  width: min(1200px, calc(100vw - 40px));
  max-height: calc(100vh - 40px);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  overflow: hidden;
}
.image-dialog::backdrop {
  background: rgba(20, 19, 17, 0.62);
  backdrop-filter: blur(3px);
}
.dialog-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.dialog-head p {
  font-size: 14.5px;
  font-weight: 600;
}
.dialog-head button {
  margin-left: auto;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  transition: border-color 0.18s ease;
}
.dialog-head button:hover {
  border-color: var(--ink);
}
.dialog-body {
  max-height: calc(100vh - 140px);
  overflow: auto;
  background: var(--paper-soft);
}
.dialog-note {
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 12.5px;
}

/* ---------- 站脚 ---------- */
.site-footer {
  padding: clamp(48px, 6vw, 72px) 0 32px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}
.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr));
  gap: 36px 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.footer-brand p {
  margin-top: 18px;
  max-width: 34ch;
  color: var(--ink-2);
  font-size: 14px;
}
.footer-col h4 {
  margin-bottom: 16px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  font-weight: 600;
}
.footer-col li + li {
  margin-top: 10px;
}
.footer-col a {
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color 0.18s ease;
}
.footer-col a:hover {
  color: var(--brand);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-top: 24px;
  color: var(--ink-3);
  font-size: 13px;
}
.footer-bottom a:hover {
  color: var(--ink);
}
.footer-bottom .footer-addr {
  margin-left: auto;
}

/* ---------- 进入视口的淡入 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}
[data-reveal][data-delay="1"] {
  transition-delay: 0.08s;
}
[data-reveal][data-delay="2"] {
  transition-delay: 0.16s;
}
[data-reveal][data-delay="3"] {
  transition-delay: 0.24s;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid,
  .closing-grid,
  .section-head {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }
  .section-head {
    gap: 20px;
  }
  .product-detail {
    grid-template-columns: minmax(0, 1fr);
  }
  .stat-grid,
  .practice,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .stat:nth-child(2n),
  .practice li:nth-child(2n),
  .steps li:nth-child(2n) {
    border-right: 0;
    padding-right: 0;
  }
  .stat:nth-child(2n + 1),
  .practice li:nth-child(2n + 1),
  .steps li:nth-child(2n + 1) {
    padding-left: 0;
  }
  .stat:nth-child(n + 3),
  .practice li:nth-child(n + 3),
  .steps li:nth-child(n + 3) {
    border-top: 1px solid var(--deep-line);
  }
  .practice li:nth-child(n + 3),
  .steps li:nth-child(n + 3) {
    border-top-color: var(--line-2);
  }
}

@media (max-width: 860px) {
  .menu-toggle {
    display: block;
  }
  .nav {
    gap: 16px;
  }
  /* 展开面板跟随头部定位：头部开启毛玻璃后会成为固定定位的包含块，
     因此这里用绝对定位并显式给出高度，避免面板被压成零高度。 */
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: calc(100vh - var(--header-h));
    height: calc(100dvh - var(--header-h));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 12px 24px 32px;
    background: var(--paper);
    border-top: 1px solid var(--line);
    overflow-y: auto;
    overscroll-behavior: contain;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, transform 0.28s var(--ease),
      visibility 0.22s;
  }
  .site-nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .site-nav a {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    font-size: 17px;
  }
  .site-nav a::after {
    display: none;
  }
  .nav-action {
    display: none;
  }
  .product-row {
    grid-template-columns: 40px minmax(0, 1fr) auto;
    gap: 14px 18px;
  }
  .product-row-desc {
    grid-column: 2 / -1;
    font-size: 14px;
  }
  .grid-3,
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }
  .detail {
    grid-template-columns: minmax(0, 1fr);
  }
  .detail.is-reversed .detail-text {
    order: 0;
  }
  .footer-main {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  .container {
    width: calc(100% - 36px);
  }
  .stat-grid,
  .practice,
  .steps {
    grid-template-columns: minmax(0, 1fr);
  }
  .stat,
  .stat:nth-child(2n),
  .practice li,
  .practice li:nth-child(2n),
  .steps li,
  .steps li:nth-child(2n) {
    padding: 24px 0;
    border-right: 0;
  }
  .stat + .stat,
  .practice li + li,
  .steps li + li {
    border-top: 1px solid var(--deep-line);
  }
  .practice li + li,
  .steps li + li {
    border-top-color: var(--line-2);
  }
  .point-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .timeline li {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
  .footer-main {
    grid-template-columns: minmax(0, 1fr);
  }
  .footer-bottom .footer-addr {
    margin-left: 0;
  }
  .btn {
    flex: 1 1 auto;
  }
  .actions {
    gap: 10px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}