/* ==========================================================================
   NORTHLINE — 站点样式
   设计语言：纸感底色 + 墨黑 + 深玉绿点缀；大字号、细分割线、克制的动效。
   ========================================================================== */

/* ------------------------------ 设计变量 ------------------------------- */
:root {
  --paper: #f7f4ee;
  --paper-2: #efece3;
  --paper-3: #e6e1d4;
  --ink: #12141a;
  --ink-2: #2b3038;
  --muted: #6b7078;
  --line: #ded9cc;
  --line-strong: #c9c3b4;
  --accent: #0e6b5c;
  --accent-deep: #0a4f44;
  --on-dark: #f2efe7;

  --font-sans: "Inter", ui-sans-serif, -apple-system, "Segoe UI", "Helvetica Neue", Arial,
    "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", monospace;

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 56px);
  --header-h: 74px;

  --fs-hero: clamp(2.45rem, 5.2vw, 4.5rem);
  --fs-h1: clamp(2.1rem, 4.2vw, 3.4rem);
  --fs-h2: clamp(1.55rem, 2.8vw, 2.5rem);
  --fs-h3: clamp(1.05rem, 1.4vw, 1.2rem);
  --fs-lead: clamp(1.02rem, 1.25vw, 1.2rem);
  --fs-body: 1rem;
  --fs-sm: 0.9rem;
  --fs-xs: 0.78rem;

  --radius: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow: 0 24px 60px -32px rgba(18, 20, 26, 0.35);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
  overflow-x: hidden;
}

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

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

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

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

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

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

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

/* 中文页面的字距放松一点 */
body[data-lang="zh"] {
  letter-spacing: 0.01em;
}

[data-lang="zh"] {
  --fs-hero: clamp(2.1rem, 4.4vw, 3.8rem);
}

/* 中文标题：行高必须给足，否则上下两行的字形会挤在一起 */
[data-lang="zh"] .hero-title,
[data-lang="zh"] .page-title,
[data-lang="zh"] .section-title,
[data-lang="zh"] .band-title,
[data-lang="zh"] .cta-title,
[data-lang="zh"] .article-title,
[data-lang="zh"] .pd-title,
[data-lang="zh"] .notfound-title {
  line-height: 1.22;
  letter-spacing: 0;
}

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

.container.narrow {
  max-width: 820px;
}

.section {
  padding-block: clamp(56px, 8vw, 110px);
}

.section--flush-top {
  padding-top: clamp(12px, 2vw, 24px);
}

.section--tint {
  background: var(--paper-2);
  border-block: 1px solid var(--line);
}

/* 内页顶部的数据条：收紧上下留白 */
.section--stats {
  padding-bottom: 0;
}

.section--stats .stat-row {
  margin-top: 0;
}

.site-main {
  display: block;
}

/* -------------------------------- 按钮 -------------------------------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.01em;
  transition: background 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}

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

.btn--primary {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  --btn-bd: var(--ink);
}

.btn--primary:hover {
  --btn-bg: var(--accent-deep);
  --btn-bd: var(--accent-deep);
}

.btn--ghost:hover {
  --btn-bd: var(--ink);
  --btn-bg: rgba(18, 20, 26, 0.04);
}

.btn--solid {
  --btn-bg: var(--paper);
  --btn-fg: var(--ink);
  --btn-bd: var(--paper);
}

.btn--solid:hover {
  --btn-bg: var(--on-dark);
  transform: translateY(-1px);
}

.btn--outline-light {
  --btn-fg: var(--on-dark);
  --btn-bd: rgba(242, 239, 231, 0.32);
}

.btn--outline-light:hover {
  --btn-bg: var(--on-dark);
  --btn-fg: var(--ink);
  --btn-bd: var(--on-dark);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 0.82rem;
}

.btn--lg {
  padding: 15px 26px;
  font-size: 0.95rem;
}

.btn--block {
  width: 100%;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 4px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.text-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease);
}

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

.text-link:hover svg {
  transform: translateX(3px);
}

/* -------------------------------- 页头 -------------------------------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-sm);
  transition: top 0.2s var(--ease);
}

.skip-link:focus-visible {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 44px);
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  color: var(--ink);
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 34px);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-size: var(--fs-sm);
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

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

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-link.is-active {
  color: var(--ink);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.nav + .header-actions {
  margin-left: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.lang-switch:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-toggle-icon svg {
  width: 22px;
  height: 22px;
}

/* 移动端菜单 */
.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  background: var(--paper);
  border-top: 1px solid var(--line);
  overflow-y: auto;
  animation: navIn 0.28s var(--ease);
}

.mobile-nav[hidden] {
  display: none;
}

@keyframes navIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-nav-inner {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 24px var(--gutter) 40px;
}

.mobile-link {
  display: block;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.mobile-link.is-active {
  color: var(--accent);
}

.mobile-nav-foot {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: auto;
  padding-top: 32px;
}

.mobile-lang {
  text-align: center;
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
}

/* ------------------------------- 通用标题 ------------------------------ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.eyebrow--light {
  color: var(--on-dark);
  opacity: 0.75;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 16px 40px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.section-head .eyebrow {
  grid-column: 1 / -1;
}

.section-head-main {
  max-width: 760px;
}

.section-title {
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.section-lead {
  margin-top: 14px;
  max-width: 58ch;
  color: var(--muted);
  font-size: var(--fs-lead);
  line-height: 1.6;
}

.section-head .text-link {
  justify-self: end;
  margin-bottom: 6px;
  white-space: nowrap;
}

.block-title {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 24px;
}

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

/* --------------------------------- 首屏 -------------------------------- */
.hero {
  padding-top: clamp(32px, 5vw, 64px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: clamp(36px, 5vw, 76px);
}

.hero-copy .eyebrow {
  margin-bottom: 22px;
}

.hero-title {
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero-lead {
  margin-top: 26px;
  max-width: 48ch;
  color: var(--muted);
  font-size: var(--fs-lead);
  line-height: 1.65;
}

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

.cert-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
}

.cert-row li {
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid var(--line);
  z-index: 0;
}

.hero-img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 10;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.hero-tag {
  position: absolute;
  z-index: 2;
  left: -18px;
  bottom: 34px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 18px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.hero-tag-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-tag-label {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* -------------------------------- 数据条 ------------------------------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(44px, 6vw, 76px);
  border-top: 1px solid var(--line);
}

.stat {
  padding: 22px 24px 6px 0;
}

.stat + .stat {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.stat-value {
  display: block;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* -------------------------------- 优势区 ------------------------------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 44px);
}

.adv {
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.adv-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.adv-title {
  margin-top: 14px;
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.adv-text {
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ------------------------------- 产品卡片 ------------------------------ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 26px);
}

.product-card {
  border: 1px solid var(--line);
  background: #fffdf8;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.product-card:hover {
  border-color: var(--ink);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.product-card.is-hidden {
  display: none;
}

.product-link {
  display: block;
  height: 100%;
}

.product-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.product-card:hover .product-media img {
  transform: scale(1.045);
}

.product-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 5px 10px;
  background: rgba(18, 20, 26, 0.86);
  color: var(--paper);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.product-body {
  position: relative;
  padding: 20px 20px 22px;
}

.product-name {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.product-summary {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta {
  margin-top: 16px;
  padding-top: 14px;
  padding-right: 30px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-2);
}

.product-meta span {
  color: var(--muted);
  margin-right: 4px;
}

.product-arrow {
  position: absolute;
  right: 18px;
  bottom: 20px;
  color: var(--accent);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.product-arrow svg {
  width: 18px;
  height: 18px;
}

.product-card:hover .product-arrow {
  opacity: 1;
  transform: none;
}

/* ------------------------------ 深色区块 ------------------------------- */
.band {
  background-color: #101318;
  background-image: linear-gradient(rgba(242, 239, 231, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 239, 231, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--on-dark);
  padding-block: clamp(56px, 8vw, 100px);
}

.band-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 40px;
}

.band-title {
  font-size: clamp(1.55rem, 3vw, 2.5rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.028em;
  max-width: 22ch;
  text-wrap: balance;
}

.band-text {
  margin-top: 16px;
  max-width: 54ch;
  color: rgba(242, 239, 231, 0.66);
  font-size: var(--fs-body);
}

/* -------------------------------- 流程 -------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 40px);
}

.step {
  position: relative;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.step::before {
  content: "";
  position: absolute;
  top: -3.5px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.step-title {
  margin-top: 12px;
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.step-text {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ------------------------------ 客户评价 ------------------------------- */
.testimonial-section {
  border-block: 1px solid var(--line);
  background: var(--paper-2);
}

.testimonial {
  display: grid;
  gap: 24px;
  max-width: 900px;
}

.quote-mark {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 5rem;
  line-height: 0.5;
  color: var(--accent);
  opacity: 0.35;
  height: 2rem;
}

.testimonial-quote {
  font-size: clamp(1.25rem, 2.2vw, 1.85rem);
  line-height: 1.4;
  letter-spacing: -0.02em;
  font-weight: 500;
  text-wrap: pretty;
}

.testimonial-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tm-author {
  font-weight: 600;
}

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

/* ------------------------------- CTA 区 ------------------------------- */
.cta-band {
  background: var(--ink);
  color: var(--on-dark);
  padding-block: clamp(56px, 8vw, 104px);
}

.cta-band-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(32px, 5vw, 64px);
}

.cta-title {
  margin-top: 18px;
  font-size: clamp(1.7rem, 3.4vw, 2.9rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.032em;
  max-width: 20ch;
  text-wrap: balance;
}

.cta-text {
  margin-top: 16px;
  max-width: 46ch;
  color: rgba(242, 239, 231, 0.68);
}

.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.cta-mail {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(242, 239, 231, 0.7);
  border-bottom: 1px solid rgba(242, 239, 231, 0.25);
  padding-bottom: 3px;
}

.cta-mail:hover {
  color: var(--on-dark);
  border-color: var(--on-dark);
}

/* -------------------------------- 页脚 -------------------------------- */
.site-footer {
  background: #0c0e12;
  color: rgba(242, 239, 231, 0.62);
  padding-block: clamp(52px, 7vw, 84px) 28px;
  font-size: var(--fs-sm);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr 1.2fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(32px, 4vw, 52px);
  border-bottom: 1px solid rgba(242, 239, 231, 0.1);
}

.footer-brand .brand {
  color: var(--on-dark);
}

.footer-brand .brand-mark {
  color: var(--on-dark);
}

.footer-blurb {
  margin-top: 20px;
  max-width: 34ch;
  line-height: 1.65;
}

.footer-mail {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border-bottom: 1px solid rgba(242, 239, 231, 0.25);
  padding-bottom: 2px;
}

.footer-mail svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

.footer-title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(242, 239, 231, 0.55);
  margin-bottom: 16px;
}

.footer-links li + li {
  margin-top: 10px;
}

.footer-links a:hover,
.footer-legal a:hover,
.footer-contact a:hover {
  color: var(--on-dark);
}

.footer-contact li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  margin-bottom: 12px;
  line-height: 1.5;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  opacity: 0.6;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.78rem;
  color: rgba(242, 239, 231, 0.45);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

/* ------------------------------ 内页头部 ------------------------------- */
.page-hero {
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: clamp(24px, 3vw, 40px);
}

.crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.crumbs li + li::before {
  content: "/";
  color: var(--line-strong);
}

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

.crumbs [aria-current] {
  color: var(--ink-2);
}

.page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 24px 56px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(24px, 3vw, 40px);
}

.page-title {
  margin-top: 14px;
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.035em;
}

.page-lead {
  color: var(--muted);
  font-size: var(--fs-lead);
  line-height: 1.65;
  max-width: 46ch;
  padding-bottom: 4px;
}

/* ------------------------------ 产品列表页 ----------------------------- */
.products-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--ink-2);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.filter-btn:hover {
  border-color: var(--ink);
}

.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.filter-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  opacity: 0.6;
}

.products-count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.filter-empty {
  padding: 64px 0;
  text-align: center;
  color: var(--muted);
}

.filter-empty[hidden] {
  display: none;
}

.note-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: clamp(36px, 5vw, 64px);
  padding: clamp(24px, 3vw, 40px);
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.note-title {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.note-text {
  margin-top: 8px;
  max-width: 52ch;
  color: var(--muted);
  font-size: 0.92rem;
}

/* ------------------------------ 产品详情页 ----------------------------- */
.pd-hero {
  padding-top: clamp(24px, 3vw, 40px);
  padding-bottom: clamp(20px, 3vw, 32px);
}

/* 详情页首屏下面的区块，间距收一点 */
.pd-hero + .section {
  padding-top: clamp(28px, 4vw, 52px);
}

.pd-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
}

.pd-media {
  position: relative;
  border: 1px solid var(--ink);
  background: var(--paper-2);
  overflow: hidden;
}

.pd-media img {
  width: 100%;
  height: auto;
}

.pd-media-cat {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 6px 12px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pd-title {
  margin-top: 14px;
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.pd-lead {
  margin-top: 18px;
  color: var(--muted);
  font-size: var(--fs-lead);
  line-height: 1.65;
  max-width: 48ch;
}

.pd-quick {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.pd-quick dt {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.pd-quick dd {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
}

.pd-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.pd-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.prose {
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.75;
}

.prose p + p {
  margin-top: 1.1em;
}

.prose p {
  max-width: 68ch;
}

.prose--lead {
  font-size: 1.05rem;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.spec-table tr {
  border-top: 1px solid var(--line);
}

.spec-table tr:last-child {
  border-bottom: 1px solid var(--line);
}

.spec-table th {
  padding: 13px 0;
  text-align: left;
  font-weight: 400;
  color: var(--muted);
}

.spec-table td {
  padding: 13px 0;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 500;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 32px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.55;
}

.feature-list svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  padding: 3px;
  box-sizing: content-box;
  color: var(--accent);
  background: rgba(14, 107, 92, 0.1);
  border-radius: 50%;
}

/* ------------------------------- 制造能力 ------------------------------ */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.cap-card {
  padding: clamp(24px, 3.4vw, 44px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cap-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.cap-title {
  margin-top: 12px;
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.cap-list {
  margin-top: 16px;
}

.cap-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.6;
}

.cap-list li + li {
  margin-top: 8px;
}

.cap-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--line-strong);
}

.cert-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.cert-list li {
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
}

/* -------------------------------- 关于页 ------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.about-story .eyebrow {
  margin-bottom: 20px;
}

.about-aside {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  border: 1px solid var(--line);
  background: #fffdf8;
}

.about-aside img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--line);
}

.about-facts {
  padding: 8px 22px 18px;
}

.about-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.about-facts > div:last-child {
  border-bottom: 0;
}

.about-facts dt {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.about-facts dd {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  border-top: 1px solid var(--line-strong);
}

.tl-item {
  position: relative;
  padding-top: 22px;
}

.tl-item::before {
  content: "";
  position: absolute;
  top: -3.5px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.tl-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.tl-text {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--ink-2);
  line-height: 1.55;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.value-card {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.value-title {
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.value-text {
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.65;
}

/* -------------------------------- 新闻 -------------------------------- */
.post-list {
  border-bottom: 1px solid var(--line);
}

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

/* 第一条与页头分割线重合，去掉避免出现双线 */
.post-row:first-child {
  border-top: 0;
}

.post-row-link {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(20px, 4vw, 56px);
  padding: clamp(24px, 3vw, 38px) 0;
  transition: background 0.3s var(--ease);
}

.post-row:hover .post-row-title {
  color: var(--accent);
}

.post-row-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.post-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.post-row-title {
  font-size: clamp(1.15rem, 1.9vw, 1.55rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  transition: color 0.25s var(--ease);
  text-wrap: balance;
}

.post-row-excerpt {
  margin-top: 10px;
  max-width: 64ch;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.post-more svg {
  width: 15px;
  height: 15px;
  transition: transform 0.3s var(--ease);
}

.post-row:hover .post-more svg {
  transform: translateX(4px);
}

/* 文章页 */
.article-head {
  padding-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.article .post-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.article-title {
  margin-top: 16px;
  max-width: 22ch;
  font-size: clamp(1.8rem, 3.6vw, 2.9rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.032em;
  text-wrap: balance;
}

.article-lead {
  margin-top: 18px;
  max-width: 60ch;
  color: var(--muted);
  font-size: var(--fs-lead);
  line-height: 1.65;
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(250px, 0.9fr);
  gap: clamp(32px, 5vw, 72px);
  padding-top: clamp(32px, 4vw, 52px);
  align-items: start;
}

.article-prose {
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: calc(var(--header-h) + 32px);
}

.aside-card {
  padding: 24px;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.aside-card--muted {
  background: transparent;
}

.aside-title {
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.aside-text {
  margin: 10px 0 18px;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.aside-links li + li {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.aside-links a {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.45;
}

.aside-links a:hover {
  color: var(--accent);
}

.aside-links svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--muted);
}

.article-foot {
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

/* -------------------------------- 联系页 ------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
}

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

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fffdf8;
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.field textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #9b9689;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14, 107, 92, 0.12);
}

.field input:user-invalid,
.field textarea:user-invalid {
  border-color: #b4402f;
}

.select-wrap {
  position: relative;
}

.select-wrap select {
  appearance: none;
  padding-right: 40px;
  cursor: pointer;
}

.select-wrap svg {
  position: absolute;
  right: 14px;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--muted);
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.form-status {
  font-size: 0.88rem;
  color: var(--accent);
}

.form-status.is-error {
  color: #b4402f;
}

.form-note {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 52ch;
}

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

.contact-item {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.ci-icon {
  color: var(--accent);
  margin-top: 2px;
}

.ci-icon svg {
  width: 18px;
  height: 18px;
}

.ci-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.ci-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.ci-value {
  font-size: 0.95rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

a.ci-value:hover {
  color: var(--accent);
}

.contact-card {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.contact-hours {
  margin-top: 6px;
  font-size: 0.92rem;
}

.contact-info .btn--block {
  margin-top: 20px;
}

.faq-block {
  max-width: 900px;
}

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

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

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  list-style: none;
}

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

.faq-icon {
  flex-shrink: 0;
  color: var(--muted);
  transition: transform 0.3s var(--ease);
}

.faq-icon svg {
  width: 18px;
  height: 18px;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-a {
  padding: 0 0 22px;
  max-width: 70ch;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* -------------------------------- 404 --------------------------------- */
.notfound {
  display: grid;
  place-items: center;
  min-height: 62vh;
  padding-block: clamp(60px, 10vw, 120px);
}

.notfound-inner {
  max-width: 620px;
  text-align: center;
}

.notfound-title {
  margin-top: 18px;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.notfound-text {
  margin-top: 16px;
  color: var(--muted);
}

.notfound-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}

/* ------------------------------ 动效（渐进） ---------------------------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  will-change: opacity, transform;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1120px) {
  .nav-list {
    gap: 20px;
  }

  .adv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 40px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }

  .hero-visual {
    max-width: 520px;
  }

  .hero-visual::before {
    inset: 14px -14px -14px 14px;
  }

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

  .about-aside {
    position: static;
    max-width: 460px;
  }

  .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 28px;
  }

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

  .article-aside {
    position: static;
    flex-direction: row;
  }

  .article-aside > * {
    flex: 1;
  }
}

@media (max-width: 960px) {
  .nav {
    display: none;
  }

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

  .header-cta {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

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

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

  .page-hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .pd-detail-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .contact-info {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 24px;
  }

  .contact-list {
    grid-column: 1 / -1;
  }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px;
  }

  .cta-band-inner {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .cta-actions {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  .band-inner {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .cert-block {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-row-link {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .post-row-meta {
    flex-direction: row;
    align-items: center;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 64px;
  }

  .brand-name {
    font-size: 0.85rem;
    letter-spacing: 0.12em;
  }

  .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 0;
  }

  .stat {
    padding: 18px 0;
    border-top: 1px solid var(--line);
  }

  .stat + .stat {
    padding-left: 0;
    border-left: 0;
  }

  .stat:nth-child(even) {
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }

  .adv-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .adv {
    padding: 22px 0;
  }

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

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

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

  .step {
    padding: 18px 0 22px;
  }

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

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

  .timeline {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0;
    border-top: 0;
  }

  .tl-item {
    padding: 16px 0 16px 20px;
    border-left: 1px solid var(--line);
  }

  .tl-item::before {
    top: 24px;
    left: -3.5px;
  }

  .value-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .value-card {
    padding: 18px 0;
  }

  .value-card + .value-card {
    border-top: 1px solid var(--line);
  }

  .feature-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-aside {
    flex-direction: column;
  }

  .contact-info {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-tag {
    left: 0;
    bottom: 0;
    padding: 10px 14px;
  }

  .hero-visual::before {
    display: none;
  }

  .hero-img {
    border: 0;
    border-bottom: 1px solid var(--line);
  }

  .pd-quick {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .pd-quick-item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
  }

  .note-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .products-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 420px) {
  .cert-row li {
    font-size: 0.64rem;
    padding: 5px 9px;
  }

  .filter-btn {
    font-size: 0.8rem;
    padding: 8px 12px;
  }
}

/* ----------------------------- 动效与可访问性 --------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

@media print {
  .site-header,
  .site-footer,
  .cta-band,
  .mobile-nav,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #fff;
  }
}