@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  color-scheme: light;
  /* 品牌色 */
  --red: #d30724;
  --blue: #2470b9;
  --green: #10ad63;
  /* 主色（slate-900，从 #061b3b 升级） */
  --deep: #0F172A;
  /* 文字 */
  --ink: #020617;
  --muted: #475569;
  /* 背景 */
  --bg-page: #eef2f5;
  --bg-alt: var(--bg-alt);
  /* 边框 */
  --line: #CBD5E1;
  /* 语义 */
  --warning: #f59e0b;
  --error: #dc2626;
  /* 布局 */
  --max: 1320px;
  /* 字体 */
  font-family: "Inter", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}


/* 全局焦点可见性（WCAG） */
*:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg-page);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  min-height: 78px;
  padding: 8px max(24px, calc((100vw - var(--max)) / 2));
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.42) 0%, rgba(15, 23, 42, 0.18) 62%, rgba(15, 23, 42, 0) 100%);
  border-bottom: 1px solid transparent;
  box-shadow: none;
  backdrop-filter: none;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled,
.site-header.is-menu-open {
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid rgba(203, 213, 225, 0.65);
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(18px);
}

.site-header .nav-item > a,
.site-header .language-button,
.site-header .menu-button span {
  color: #fff;
  background-color: transparent;
  transition: color 0.3s ease, background-color 0.3s ease;
}

.site-header.is-scrolled .nav-item > a,
.site-header.is-scrolled .language-button,
.site-header.is-scrolled .menu-button span,
.site-header.is-menu-open .menu-button span {
  color: var(--deep);
}

.site-header .quote-button {
  background: var(--red);
  transition: background 0.15s ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  display: block;
  width: 100px;
  height: 64px;
  object-fit: contain;
}

.brand .logo-white {
  display: none;
}

.site-header:not(.is-scrolled):not(.is-menu-open) .brand .logo-dark {
  display: none;
}

.site-header:not(.is-scrolled):not(.is-menu-open) .brand .logo-white {
  display: block;
}

.desktop-nav {
  display: flex;
  align-items: stretch;
  gap: 2px;
  margin-left: 32px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-item > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 54px;
  padding: 0 10px;
  color: var(--deep);
  font-size: 14px;
  font-weight: 700;
  border-radius: 3px;
  white-space: nowrap;
}

.nav-item:hover > a,
.nav-item:focus-within > a {
  color: var(--red);
  background: rgba(255, 255, 255, 0.76);
}

.dropdown {
  position: absolute;
  top: calc(100% - 4px);
  left: 0;
  display: grid;
  min-width: 250px;
  padding: 10px;
  background: #fff;
  border: 1px solid rgba(203, 213, 225, 0.9);
  border-radius: 6px;
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  backdrop-filter: blur(16px);
}

.dropdown a {
  padding: 10px 12px;
  color: var(--ink);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  border-radius: 3px;
}

.dropdown a:hover,
.dropdown a:focus {
  color: var(--red);
  background: var(--soft);
}

.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 24px;
}

.menu-button {
  color: var(--deep);
  background: transparent;
  border: 0;
}

.quote-button {
  min-height: 44px;
  padding: 0 20px;
  color: #fff;
  background: var(--red);
  border: 0;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  flex: 0 0 auto;
  min-width: 124px;
  white-space: nowrap;
}

.menu-button {
  display: none;
}

.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  min-height: 680px;
  min-height: clamp(680px, 88vh, 980px);
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 148px max(24px, calc((100vw - var(--max)) / 2)) 58px;
  background: var(--deep);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-fallback,
.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
}

.hero-video {
  display: none;
}

.hero.is-video .hero-video {
  display: block;
}

.hero.is-video .hero-fallback {
  display: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.78) 38%, rgba(15, 23, 42, 0.42) 72%, rgba(15, 23, 42, 0.28) 100%);
}

/* 视差滚动：媒体层比容器高，滚动时位移 */
.hero-media {
  height: 120%;
  top: -10%;
}

.hero.is-parallax .hero-media {
  will-change: transform;
}

/* 点击暂停/播放按钮 */
.hero-video-toggle {
  position: absolute;
  right: 28px;
  bottom: 28px;
  z-index: 3;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.hero-video-toggle:hover {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(255, 255, 255, 0.85);
}

.hvt-icon {
  display: block;
  width: 14px;
  height: 14px;
}

.hvt-pause {
  background:
    linear-gradient(#fff, #fff) left / 4px 100% no-repeat,
    linear-gradient(#fff, #fff) right / 4px 100% no-repeat;
}

.hvt-play {
  width: 0;
  height: 0;
  background: transparent;
  border-left: 13px solid #fff;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  margin-left: 3px;
}

/* 滚动指示器 */
.hero-scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 24px;
  z-index: 3;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 1;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.hero-scroll-hint.is-hidden {
  opacity: 0;
}

.hsh-mouse {
  display: block;
  width: 22px;
  height: 34px;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  border-radius: 11px;
  position: relative;
}

.hsh-wheel {
  position: absolute;
  left: 50%;
  top: 6px;
  width: 2px;
  height: 6px;
  margin-left: -1px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 1px;
  animation: hsh-wheel 1.8s ease-in-out infinite;
}

@keyframes hsh-wheel {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  60% {
    transform: translateY(10px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 0;
  }
}

.hsh-label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.hero-card {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 30px 32px;
  background: transparent;
  border: 0;
  border-radius: 4px;
  box-shadow: none;
  backdrop-filter: none;
}

.hero h1 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(44px, 4.2vw, 62px);
  font-weight: 700;
  line-height: 1.08;
  text-shadow: 0 2px 24px rgba(15, 23, 42, 0.35);
}

.hero p {
  max-width: 630px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-shadow: 0 1px 14px rgba(15, 23, 42, 0.4);
}

.hero .btn-secondary {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.58);
}

.hero .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 25px;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}


.btn:active {
  transform: scale(0.98);
}

.btn::after {
  content: "→";
  margin-left: 14px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(180deg, #dd0928, var(--red));
  border: 1px solid var(--red);
  box-shadow: 0 14px 28px rgba(211, 7, 36, 0.22);
}

.btn-secondary {
  color: var(--red);
  background: #fff;
  border: 1px solid rgba(211, 7, 36, 0.55);
}

.trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust article {
  min-height: 138px;
  padding: 24px 16px;
  text-align: center;
  border-right: 1px solid var(--line);
}

.trust article:last-child {
  border-right: 0;
}

.trust svg {
  width: 31px;
  height: 31px;
  color: var(--blue);
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trust strong,
.trust span {
  display: block;
}

.trust strong {
  margin-top: 12px;
  color: var(--deep);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.05;
}

.trust span {
  max-width: 220px;
  margin: 8px auto 0;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.55;
}

.section {
  padding: 64px max(24px, calc((100vw - var(--max)) / 2));
  background: #fff;
}

.section-title {
  max-width: 720px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-title.left {
  margin-left: 0;
  text-align: left;
}

.section-title h2,
.factory h2,
.quote-section h2 {
  margin: 0;
  color: var(--deep);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.12;
}

.eyebrow {
  display: inline-block;
  color: var(--red);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title p,
.factory p,
.quote-section p {
  margin: 14px 0 0;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 14px;
  line-height: 1.65;
}

.solution-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.solution-grid article,
.resource-grid article {
  min-height: 256px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.solution-grid article:hover,
.resource-grid article:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

.line-icon {
  width: 48px;
  height: 48px;
  color: var(--blue);
  fill: none;
  stroke: currentColor;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.solution-grid h3,
.machine-grid h3,
.resource-grid h3,
.process-grid h3 {
  margin: 16px 0 0;
  color: var(--deep);
  font-size: 18px;
  line-height: 1.2;
}

.solution-grid p,
.machine-grid p,
.resource-grid p,
.process-grid p {
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.55;
}

.solution-grid small,
.resource-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.resource-grid span {
  color: var(--red);
  text-transform: uppercase;
}

.solution-grid a,
.machine-grid a,
.resource-grid a {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.solution-grid a::after,
.machine-grid a::after,
.resource-grid a::after {
  content: "→";
  margin-left: 10px;
}

.process,
.resources,
.project-proof {
  background: var(--bg-alt);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}

.process-grid article {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.process-grid span {
  display: block;
  color: var(--red);
  font-size: 24px;
  font-weight: 700;
}

.process-grid h3 {
  margin-top: 8px;
}

.case-cta {
  display: grid;
  justify-items: center;
  gap: 18px;
  margin-top: 42px;
  padding: 30px 24px;
  text-align: center;
  background: linear-gradient(135deg, #fff 0%, #F1F5F9 100%);
  border: 1px solid #CBD5E1;
  border-radius: 4px;
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.06);
}

.case-cta strong {
  color: var(--deep);
  font-size: 19px;
  max-width: 760px;
  line-height: 1.35;
}

.case-cta.compact {
  margin-top: 26px;
  padding: 24px;
  background: #fff;
}

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

.case-grid article {
  min-height: 232px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.06);
}

.case-grid strong {
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.case-grid h3 {
  margin: 16px 0 0;
  color: var(--deep);
  font-size: 20px;
  line-height: 1.2;
}

.case-grid p {
  margin: 14px 0 0;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.7;
}

.video-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.video-case {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.06);
}

.video-case video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-alt);
  object-fit: cover;
}

.video-case div {
  padding: 20px 22px 24px;
}

.video-case strong {
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.video-case h3 {
  margin: 12px 0 0;
  color: var(--deep);
  font-size: 20px;
  line-height: 1.25;
}

.video-case p {
  margin: 12px 0 0;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.7;
}

.machine-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.machine-grid article {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.machine-grid article:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

.machine-media {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: var(--bg-alt);
}

.machine-grid img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border: 0;
  transition: transform 0.3s ease;
}

.machine-grid article:hover img {
  transform: scale(1.05);
}

.machine-grid h3,
.machine-grid p,
.machine-grid a {
  margin-left: 0;
  margin-right: 0;
}

.machine-grid h3 {
  margin: 20px 20px 0;
  font-size: 16px;
  line-height: 1.3;
}

.machine-grid p {
  margin: 12px 20px 0;
  font-size: 13px;
  line-height: 1.55;
}

.machine-grid a {
  display: inline-flex;
  align-items: center;
  margin: 16px 20px 20px;
  font-size: 13px;
  font-weight: 600;
  transition: color 0.15s ease;
}

.machine-grid a::after {
  content: "→";
  margin-left: 8px;
  transition: transform 0.15s ease;
}

.machine-grid a:hover::after {
  transform: translateX(4px);
}

.factory {
  display: grid;
  grid-template-columns: 0.74fr 1fr;
  align-items: center;
  gap: 56px;
}

.factory ul {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.55;
}

.factory li::before {
  content: "⊙";
  margin-right: 14px;
  color: var(--red);
}

.factory-video {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 3px;
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.12);
}

.factory-video::after {
  position: absolute;
  inset: 0;
  content: "";
  background: radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.02), rgba(15, 23, 42, 0.14) 72%), linear-gradient(180deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.12));
}

.factory-video img {
  display: block;
  width: 100%;
  height: 360px;
  object-fit: cover;
  filter: brightness(1.06) contrast(1.04) saturate(1.02);
}

.factory-video figcaption {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-shadow: 0 2px 14px rgba(15, 23, 42, 0.55);
}

.factory-video button {
  width: 72px;
  height: 72px;
  color: #fff;
  background: var(--red);
  border: 2px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  box-shadow: 0 18px 46px rgba(211, 7, 36, 0.28);
}

.resource-grid {
  grid-template-columns: repeat(3, 1fr);
}

.quote-section {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 48px;
  padding: 56px max(24px, calc((100vw - var(--max)) / 2)) 64px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.78) 100%),
    url("assets/video/hero-line-poster.jpg") center/cover no-repeat;
  position: relative;
}

.quote-section h2,
.quote-section p {
  color: #fff;
}

.quote-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 22px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 3px;
}

.quote-form input,
.quote-form textarea,
.modal-card input,
.modal-card textarea {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  outline: 0;
}

.field {
  display: grid;
  gap: 7px;
  margin: 0;
}

.field span {
  color: rgba(255, 255, 255, 0.9);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 12px;
  font-weight: 700;
}

.modal-card .field span {
  color: var(--muted);
  text-transform: none;
}

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

.quote-form textarea,
.modal-card textarea {
  min-height: 108px;
  padding-top: 12px;
  resize: vertical;
}

.quote-form button,
.privacy-note,
.form-success,
.form-error {
  grid-column: 1 / -1;
}

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

.form-error {
  margin: 0;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.14);
  border-left: 3px solid #fca5a5;
  border-radius: 3px;
  color: #fff;
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.6;
}

.modal-error {
  background: #fdecec;
  border-left-color: var(--red);
  color: var(--error);
}


.certifications {
  background: var(--bg-alt);
  padding: 80px max(24px, calc((100vw - var(--max)) / 2));
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.cert-card {
  background: #fff;
  border: 1px solid rgba(203, 213, 225, 0.8);
  border-radius: 6px;
  padding: 28px 24px;
  text-align: center;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.cert-card:hover {
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--deep);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.cert-card h3 {
  margin: 0 0 8px;
  color: var(--deep);
  font-size: 16px;
  font-weight: 700;
}

.cert-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.case-card {
  background: #fff;
  border: 1px solid rgba(203, 213, 225, 0.8);
  border-radius: 6px;
  padding: 28px 24px;
  transition: box-shadow 0.2s ease;
}

.case-card:hover {
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

.case-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.case-country,
.case-liquid {
  display: inline-block;
  padding: 4px 12px;
  background: #F1F5F9;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--deep);
}

.case-card h3 {
  margin: 0 0 16px;
  color: var(--deep);
  font-size: 18px;
  font-weight: 700;
}

.case-specs {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.case-specs li {
  padding: 6px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  border-bottom: 1px solid rgba(203, 213, 225, 0.4);
}

.case-specs li:last-child {
  border-bottom: 0;
}

.case-note {
  margin: 0;
  padding: 10px 14px;
  background: #fff8e1;
  border-left: 3px solid var(--warning);
  border-radius: 3px;
  color: #92400e;
  font-size: 12px;
  font-style: italic;
}

.mobile-sticky-bar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 25;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.98);
  border-top: 1px solid rgba(203, 213, 225, 0.9);
  box-shadow: 0 -6px 24px rgba(15, 23, 42, 0.1);
  gap: 10px;
  transform: translateY(100%);
  transition: transform 0.35s ease;
}

.mobile-sticky-bar.is-visible {
  transform: translateY(0);
}

.msb-wa,
.msb-quote {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}

.msb-wa {
  color: #fff;
  background: #25d366;
}

.msb-quote {
  color: #fff;
  background: var(--red);
}

.quote-form .privacy-note {
  margin: -2px 0 0;
  color: rgba(255, 255, 255, 0.74);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 12px;
  line-height: 1.55;
}

.form-success {
  margin: 0;
  color: #fff;
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

.site-footer {
  background: var(--bg-alt);
  color: var(--muted);
}

/* === 第一层：品牌 + 联系方式 === */
.footer-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  padding: 36px max(24px, calc((100vw - var(--max)) / 2)) 32px;
  align-items: center;
}

.footer-brand {
  max-width: 420px;
}

.footer-logo {
  width: 90px;
  height: auto;
  margin-bottom: 10px;
}

.footer-brand p {
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.55;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.footer-contact-label {
  color: var(--red);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.footer-contact a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  transition: color 0.15s ease;
}

.footer-contact a:hover {
  color: var(--deep);
}

.footer-contact svg {
  flex-shrink: 0;
}

.footer-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  margin-top: 2px;
  color: #fff;
  background: var(--red);
  border-radius: 3px;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.15s ease;
  cursor: pointer;
}

.footer-cta-btn:hover {
  background: #b80620;
}

/* === 分隔线 === */
.footer-divider {
  height: 1px;
  background: var(--line);
  margin: 0 max(24px, calc((100vw - var(--max)) / 2));
}

/* === 第二层：四列链接 === */
.footer-links {
  display: flex;
  justify-content: space-between;
  padding: 48px max(24px, calc((100vw - var(--max)) / 2));
  align-items: flex-start;
}

.footer-links nav {
  flex: 0 0 auto;
  min-width: 180px;
}

.footer-links nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links h3 {
  margin: 0 0 16px;
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.footer-links a {
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--blue);
}

/* === 第三层：社交 + 版权 === */
.footer-bottom {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 20px max(24px, calc((100vw - var(--max)) / 2)) 28px;
}

.footer-bottom span {
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
}

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

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.social-row a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 50%;
  transition: color 220ms ease, background 220ms ease, border-color 220ms ease, transform 220ms ease;
}

.social-row a:hover,
.social-row a:focus-visible {
  color: var(--deep);
  background: #fff;
  border-color: rgba(15, 23, 42, 0.3);
  transform: translateY(-2px);
}

.social-row a:nth-child(1):hover,
.social-row a:nth-child(1):focus-visible {
  color: #1877f2;
  border-color: rgba(24, 119, 242, 0.4);
}

.social-row a:nth-child(2):hover,
.social-row a:nth-child(2):focus-visible {
  color: #0a66c2;
  border-color: rgba(10, 102, 194, 0.4);
}

.social-row a:nth-child(3):hover,
.social-row a:nth-child(3):focus-visible {
  color: #ff0033;
  border-color: rgba(255, 0, 51, 0.4);
}

.social-row svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  display: block;
}

.floating-actions {
  position: fixed;
  right: 24px;
  bottom: 26px;
  z-index: 40;
  display: grid;
  gap: 10px;
}

.float-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  color: #fff;
  border: 0;
  border-radius: 50%;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.22);
  font-size: 24px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.float-button:hover,
.float-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.28);
}

.float-button svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.float-button.email,
.float-button.top {
  background: var(--blue);
}

.float-button.whatsapp {
  background: var(--green);
}

.float-button.whatsapp svg path:nth-child(2) {
  stroke-width: 1.45;
}

.float-button.phone {
  background: var(--blue);
}

.float-button.top.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.92);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 18px;
  overflow: auto;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.54);
  border: 0;
}

.modal-card {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  width: min(100%, 430px);
  max-height: calc(100vh - 36px);
  overflow: auto;
  padding: 22px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 22px 70px rgba(15, 23, 42, 0.36);
}

.modal-card > span {
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.modal-card h2 {
  margin: 0;
  color: var(--deep);
  font-size: 25px;
  line-height: 1.1;
}

.modal-card p {
  color: var(--muted);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  line-height: 1.55;
}

.modal-card .modal-success {
  color: var(--green);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  color: var(--ink);
  background: var(--bg-alt);
  border: 0;
  border-radius: 50%;
  font-size: 22px;
}

@media (max-width: 899px) {
  html,
  body {
    overflow-x: hidden;
  }

  body {
    background: var(--bg-page);
    overflow-wrap: break-word;
  }

  img,
  video,
  iframe,
  table {
    max-width: 100%;
  }

  .mobile-sticky-bar {
    display: flex;
    left: 0;
    right: 0;
    width: auto;
    transform: translateY(100%);
  }

  .mobile-sticky-bar.is-visible {
    transform: translateY(0);
  }

  .site-header {
    left: 0;
    right: 0;
    width: auto;
    min-height: 74px;
    padding: 8px 18px;
    transform: none;
  }

  .brand img {
    width: 76px;
    height: 58px;
  }

  .desktop-nav,
  .quote-button {
    display: none;
  }

  .menu-button {
    display: grid;
    gap: 4px;
    width: 32px;
  }

  .menu-button span {
    width: 23px;
    height: 2px;
    background-color: #fff;
    transition: background-color 0.3s ease;
  }

  .site-header.is-scrolled .menu-button span,
  .site-header.is-menu-open .menu-button span {
    background-color: var(--deep);
  }

  .mobile-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    z-index: 29;
    display: none;
    width: auto;
    max-height: calc(100vh - 74px);
    overflow: auto;
    padding: 10px 18px 18px;
    background: rgba(255,255,255,0.985);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.14);
    transform: translateX(-50%);
  }

  .mobile-home {
    display: block;
    padding: 13px 0;
    color: var(--deep);
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid rgba(203,213,225,0.72);
  }

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

  .mobile-nav details {
    padding: 13px 0;
    border-bottom: 1px solid rgba(203,213,225,0.72);
  }

  .mobile-nav summary {
    display: flex;
    justify-content: space-between;
    color: var(--deep);
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
  }

  .mobile-nav summary::-webkit-details-marker {
    display: none;
  }

  .mobile-nav a {
    display: block;
    padding: 8px 0 0 14px;
    color: var(--muted);
    font-family: "Inter", "Noto Sans SC", sans-serif;
    font-size: 13px;
  }

  main,
  .site-footer {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    background: #fff;
  }

  .hero {
    min-height: 560px;
    min-height: 92svh;
    padding: 136px 24px 34px;
  }

  .hero-fallback,
  .hero-video {
    object-position: 55% center;
  }

  .hero-overlay {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.52) 0%, rgba(15, 23, 42, 0.74) 40%, rgba(15, 23, 42, 0.94) 100%);
  }

  .hero-card {
    padding: 22px 20px 24px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero p {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
  }

  .trust {
    grid-template-columns: 1fr 1fr;
    padding: 0;
  }

  .trust article {
    min-height: 138px;
    border-bottom: 1px solid var(--line);
  }

  .trust article:nth-child(2n) {
    border-right: 0;
  }

  .section,
  .quote-section {
    padding-left: 24px;
    padding-right: 24px;
  }

  .solution-grid,
  .machine-grid,
  .resource-grid,
  .process-grid,
  .case-grid,
  .video-case-grid,
  .factory,
  .quote-section,
  .footer-main,
  .footer-bottom {
    grid-template-columns: 1fr;
  }

  .solution-grid,
  .machine-grid,
  .resource-grid,
  .video-case-grid {
    gap: 14px;
  }

  .machine-grid img {
    height: 100%;
  }

  .machine-media {
    height: 250px;
  }

  .process-grid article {
    display: grid;
    grid-template-columns: 58px 1fr;
    column-gap: 16px;
  }

  .process-grid span {
    grid-row: 1 / span 2;
  }

  .process-grid h3,
  .process-grid p {
    grid-column: 2;
  }

  .factory-video img {
    height: 260px;
  }

  .quote-section {
    gap: 28px;
  }

  .cert-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .cert-card {
    padding: 20px 14px;
  }

  .cert-badge {
    width: 52px;
    height: 52px;
    font-size: 14px;
    margin-bottom: 12px;
  }

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

  .quote-form textarea,
  .quote-form button,
  .form-success {
    grid-column: auto;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 36px 24px 28px;
  }

  .footer-contact {
    align-items: flex-start;
  }

  .footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding: 28px 24px;
  }

  .footer-links nav {
    flex: auto;
    min-width: auto;
  }

  .footer-bottom {
    grid-template-columns: 1fr;
    gap: 12px;
    align-items: start;
    padding: 16px 24px 24px;
  }

  .footer-credit {
    order: 3;
  }

  .floating-actions {
    right: 12px;
    bottom: calc(88px + env(safe-area-inset-bottom));
  }

  .float-button {
    width: 48px;
    height: 48px;
    font-size: 21px;
  }
}