/* ============================================================
   KLJ 机床刀具制造 企业官网 - 全局样式表
   设计系统: 深钢蓝(主) + 工业橙(强调) + 中性灰
   说明: 移动端优先响应式, 基于 CSS 变量
   ============================================================ */

/* ---------- 1. 设计令牌 (Design Tokens) ---------- */
:root {
  /* 品牌色 */
  --color-primary: #0e2a4a;        /* 深钢蓝 - 主色 */
  --color-primary-light: #123e6b;  /* 亮钢蓝 */
  --color-primary-dark: #081c33;   /* 深色背景 */
  --color-accent: #f58220;         /* 工业橙 - 强调色 */
  --color-accent-dark: #e06a08;    /* 橙 - 悬停 */
  --color-accent-soft: #fff3e6;    /* 橙 - 浅底 */

  /* 中性色 */
  --color-bg: #f5f7fa;             /* 页面背景 */
  --color-surface: #ffffff;        /* 卡片背景 */
  --color-text: #1f2d3d;           /* 主文字 */
  --color-text-secondary: #5a6b7b; /* 次级文字 */
  --color-text-muted: #8a98a8;     /* 弱化文字 */
  --color-border: #e3e8ef;         /* 边框 */

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;

  /* 字号阶梯 */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: 3rem;

  /* 间距 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 5rem;

  /* 布局 */
  --container-max: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 999px;

  /* 阴影与过渡 */
  --shadow-sm: 0 1px 3px rgba(14, 42, 74, 0.08);
  --shadow-md: 0 6px 18px rgba(14, 42, 74, 0.1);
  --shadow-lg: 0 16px 40px rgba(14, 42, 74, 0.16);
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);

  /* 导航状态 (JS 控制) */
  --nav-bg: transparent;
  --nav-text: #ffffff;
}

/* ---------- 2. Reset & 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  font-size: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

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

/* 可访问性: 尊重减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- 3. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-10);
}

.section--alt {
  background: var(--color-surface);
}

.section--dark {
  background: var(--color-primary-dark);
  color: #dbe6f2;
}

/* ---------- 4. 通用组件 ---------- */

/* 区段标题 */
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-8);
}

.section-head__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-head__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.section--dark .section-head__title {
  color: #fff;
}

.section-head__desc {
  color: var(--color-text-secondary);
}

.section--dark .section-head__desc {
  color: #9db4cc;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(245, 130, 32, 0.35);
}

.btn--primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(245, 130, 32, 0.4);
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--sm {
  padding: 0.45rem 1.1rem;
  font-size: var(--fs-sm);
}

.btn:active {
  transform: translateY(0);
}

/* 标签徽章 */
.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge--accent {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.75);
}

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

.breadcrumb .sep {
  opacity: 0.5;
}

/* ---------- 5. 页头 / 导航 ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--nav-bg);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header.is-scrolled {
  --nav-bg: rgba(8, 28, 51, 0.97);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--nav-text);
}

.logo__mark {
  height: 42px;
  width: auto;
  max-width: 180px;
  flex-shrink: 0;
}

.logo__text {
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.logo__text small {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.65);
  text-transform: uppercase;
}

/* 主导航 */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  position: relative;
  color: var(--nav-text);
  font-size: var(--fs-base);
  font-weight: 500;
  padding-block: var(--space-2);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__cta {
  padding: 0.55rem 1.4rem;
  font-size: var(--fs-sm);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  border-radius: var(--radius-sm);
  z-index: 1001;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端导航抽屉 */
@media (max-width: 991px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 82vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: calc(var(--header-height) + var(--space-5)) var(--space-6) var(--space-6);
    background: var(--color-primary-dark);
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.35);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .nav__link {
    display: block;
    padding: var(--space-3) var(--space-2);
    font-size: var(--fs-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav__link::after {
    display: none;
  }

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

  .nav__cta {
    margin-top: var(--space-5);
    text-align: center;
  }
}

/* 遮罩层 */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(8, 28, 51, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ---------- 6. 页脚 ---------- */
.footer {
  background: var(--color-primary-dark);
  color: #9db4cc;
  padding-top: var(--space-10);
  font-size: var(--fs-sm);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
}

.footer__brand p {
  margin-top: var(--space-4);
  color: #7e97b1;
}

.footer__title {
  color: #fff;
  font-size: var(--fs-base);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer__list li {
  margin-bottom: var(--space-3);
}

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

.footer__contact li {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  align-items: flex-start;
}

.footer__contact .icon {
  flex-shrink: 0;
  margin-top: 3px;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--fs-xs);
  color: #6b84a0;
}

/* ---------- 7. 页头横幅 (内页) ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-10)) 0 var(--space-10);
  background: linear-gradient(120deg, var(--color-primary-dark) 0%, var(--color-primary) 55%, var(--color-primary-light) 100%);
  color: #fff;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 20%, rgba(245, 130, 32, 0.18), transparent 40%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.025) 0 2px, transparent 2px 22px);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: var(--fs-3xl);
  font-weight: 800;
  margin-top: var(--space-3);
  letter-spacing: 0.02em;
}

.page-hero__desc {
  margin-top: var(--space-3);
  max-width: 560px;
  color: rgba(255, 255, 255, 0.75);
}

/* ---------- 8. Hero (首页) ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  padding-block: calc(var(--header-height) + var(--space-8));
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(100deg, rgba(8, 28, 51, 0.92) 0%, rgba(14, 42, 74, 0.78) 45%, rgba(18, 62, 107, 0.5) 100%),
    url("../assets/images/hero-bg.svg") center / cover no-repeat;
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.02) 0 2px, transparent 2px 26px);
}

.hero__content {
  max-width: 640px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 1rem;
  border: 1px solid rgba(245, 130, 32, 0.5);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-5);
  letter-spacing: 0.06em;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.01em;
}

.hero h1 .hl {
  color: var(--color-accent);
}

.hero__desc {
  margin-top: var(--space-5);
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.82);
  max-width: 520px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 560px;
}

.hero__stat-num {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.hero__stat-label {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.7);
}

/* 滚动提示 */
.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: var(--space-6);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
}

.hero__scroll-line {
  width: 1px;
  height: 42px;
  background: linear-gradient(180deg, var(--color-accent), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ---------- 9. 特色/优势卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  margin-bottom: var(--space-5);
}

.feature-card__img {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-accent-soft);
  margin-bottom: var(--space-5);
}

.feature-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.feature-card:hover .feature-card__img img {
  transform: scale(1.06);
}

.feature-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.feature-card h3 {
  font-size: var(--fs-md);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

/* ---------- 10. 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #eef3f9, #dfe8f2);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.product-card__media svg {
  width: 56%;
  height: 56%;
  color: var(--color-primary-light);
  transition: transform var(--transition);
}

.product-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.product-card:hover .product-card__img {
  transform: scale(1.08);
}

.product-card__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.product-card h3 {
  font-size: var(--fs-md);
  color: var(--color-primary);
}

.product-card__meta {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.product-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  flex: 1;
}

.product-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
}

.product-card__price {
  font-size: var(--fs-sm);
  color: var(--color-accent-dark);
  font-weight: 700;
}

/* ---------- 11. 分类筛选 (产品页) ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: 0.5rem 1.4rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  transition: all var(--transition);
}

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

.filter-btn.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(245, 130, 32, 0.3);
}

/* 筛选动画 */
.product-grid .product-card {
  animation: cardIn 0.4s ease both;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 12. 流程/步骤 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  counter-reset: step;
}

.process-step {
  position: relative;
  padding-top: var(--space-5);
}

.process-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.9;
}

.process-step h3 {
  color: #fff;
  font-size: var(--fs-md);
  margin: var(--space-3) 0 var(--space-2);
}

.process-step p {
  color: #9db4cc;
  font-size: var(--fs-sm);
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 3.4rem;
  right: -var(--space-6);
  width: var(--space-6);
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

/* ---------- 13. 时间线 (关于页) ---------- */
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: var(--space-8);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-primary));
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-8) + 8px - 5px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

.timeline__year {
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--color-primary);
}

.timeline__item h3 {
  font-size: var(--fs-md);
  color: var(--color-primary);
  margin: var(--space-1) 0 var(--space-1);
}

.timeline__item p {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

/* ---------- 14. 新闻卡片 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.news-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.news-card__thumb {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.news-card__thumb svg {
  width: 42%;
  height: 42%;
  color: rgba(255, 255, 255, 0.28);
}

.news-card__date {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: rgba(8, 28, 51, 0.75);
  color: #fff;
  font-size: var(--fs-xs);
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
}

.news-card__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card h3 {
  font-size: var(--fs-base);
  color: var(--color-primary);
  line-height: 1.5;
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card p {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__more {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-accent-dark);
  font-weight: 600;
}

/* ---------- 15. 关于区块 (首页) ---------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

.about-split__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 10 / 7;
}

.about-split__media img,
.about-split__media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-split__media-badge {
  position: absolute;
  right: var(--space-5);
  bottom: var(--space-5);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 700;
  text-align: center;
  line-height: 1.3;
  box-shadow: var(--shadow-md);
}

.about-split__media-badge strong {
  display: block;
  font-size: var(--fs-xl);
}

.about-split__content h2 {
  font-size: var(--fs-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  line-height: 1.35;
}

.about-split__content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.about-points {
  margin: var(--space-5) 0 var(--space-6);
}

.about-points li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  color: var(--color-text);
  font-size: var(--fs-sm);
}

.about-points .icon {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

/* ---------- 16. 数据统计 (深色) ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}

.stats-bar__num {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.stats-bar__num .suffix {
  font-size: var(--fs-xl);
}

.stats-bar__label {
  color: #9db4cc;
  font-size: var(--fs-sm);
  margin-top: var(--space-1);
}

/* ---------- 17. 合作伙伴 ---------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}

.partner-item {
  aspect-ratio: 3 / 2;
  display: grid;
  place-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 700;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  transition: all var(--transition);
  user-select: none;
}

.partner-item:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

/* ---------- 18. CTA 区块 ---------- */
.cta-banner {
  background: linear-gradient(115deg, var(--color-accent) 0%, #ff9a3d 60%, #ffb25e 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.06) 0 2px, transparent 2px 24px);
}

.cta-banner > * {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: var(--fs-2xl);
  font-weight: 800;
  margin-bottom: var(--space-3);
}

.cta-banner p {
  opacity: 0.92;
  margin-bottom: var(--space-6);
}

.cta-banner .btn {
  background: var(--color-primary-dark);
  box-shadow: 0 8px 24px rgba(8, 28, 51, 0.3);
}

.cta-banner .btn:hover {
  background: var(--color-primary);
}

/* ---------- 19. 联系区块 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-8);
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact-item__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
}

.contact-item__icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
}

.contact-item h3 {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 2px;
}

.contact-item p {
  font-size: var(--fs-md);
  color: var(--color-primary);
  font-weight: 600;
  word-break: break-all;
}

/* 表单 */
.form-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.form-card h2 {
  font-size: var(--fs-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.form-card > p {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-6);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.form-group label .req {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(245, 130, 32, 0.15);
  background: var(--color-surface);
}

.form-control.is-invalid {
  border-color: #e5484d;
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

.form-error {
  font-size: var(--fs-xs);
  color: #e5484d;
  min-height: 1.2em;
}

.form-submit {
  grid-column: 1 / -1;
  justify-self: start;
}

/* ---------- 21. 资质证书 (关于页) ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.cert-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.cert-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-3);
  border-radius: 50%;
  background: var(--color-accent-soft);
  display: grid;
  place-items: center;
}

.cert-card__icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.cert-card h3 {
  font-size: var(--fs-base);
  color: var(--color-primary);
}

.cert-card p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* 认证证书图片展示 */
.cert-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.cert-photo {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  text-align: center;
  cursor: zoom-in;
  transition: transform var(--transition), box-shadow var(--transition);
}

.cert-photo:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.cert-photo__img {
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg);
  margin-bottom: var(--space-3);
}

.cert-photo__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

.cert-photo:hover .cert-photo__img img {
  transform: scale(1.04);
}

.cert-photo h3 {
  font-size: var(--fs-base);
  color: var(--color-primary);
  margin-bottom: 2px;
}

.cert-photo p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* 证书放大弹窗 */
.cert-modal {
  position: fixed;
  inset: 0;
  z-index: 1300;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  background: rgba(8, 28, 51, 0.8);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.cert-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.cert-modal__panel {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 560px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cert-modal.is-open .cert-modal__panel {
  transform: translateY(0);
}

.cert-modal__close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  z-index: 2;
  transition: all var(--transition);
}

.cert-modal__close:hover {
  background: var(--color-accent);
  color: #fff;
  transform: rotate(90deg);
}

.cert-modal__panel img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

.cert-modal__caption {
  text-align: center;
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

.cert-modal__caption strong {
  color: var(--color-primary);
}

/* ---------- 22. 空状态 / 加载 ---------- */
.loading-state,
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-3);
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ---------- 23. 弹窗 (产品详情) ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 28, 51, 0.68);
  backdrop-filter: blur(4px);
}

.modal__panel {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  transform: translateY(24px) scale(0.98);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.is-open .modal__panel {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  transition: all var(--transition);
  z-index: 2;
}

.modal__close:hover {
  background: var(--color-accent);
  color: #fff;
  transform: rotate(90deg);
}

.modal__body {
  padding: var(--space-6);
}

.modal__media {
  aspect-ratio: 16 / 7;
  background: linear-gradient(135deg, #eef3f9, #d9e4ef);
  display: grid;
  place-items: center;
  margin: calc(-1 * var(--space-6)) calc(-1 * var(--space-6)) var(--space-5);
}

.modal__media svg {
  width: 120px;
  height: 120px;
  color: var(--color-primary-light);
}

.modal__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal__body h2 {
  font-size: var(--fs-xl);
  color: var(--color-primary);
}

.modal__spec {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.modal__spec-item {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-sm);
}

.modal__spec-item span {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  margin-bottom: 2px;
}

.modal__spec-item strong {
  color: var(--color-primary);
}

.modal__desc {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
}

/* ---------- 24. Toast 反馈 ---------- */
.toast-wrap {
  position: fixed;
  top: calc(var(--header-height) + var(--space-4));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-md);
  background: var(--color-primary-dark);
  color: #fff;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease both;
  max-width: min(90vw, 420px);
}

.toast--success { background: #1a7f37; }
.toast--error { background: #d1242f; }

.toast.is-leaving {
  animation: toastOut 0.3s ease both;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; transform: translateY(-12px); }
}

/* ---------- 25. 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 900;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--color-accent);
}

.back-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- 26. 滚动渐入动画 ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--delay, 0s);
  will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
  [data-animate] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 27. 响应式 ---------- */
@media (max-width: 1199px) {
  .feature-grid,
  .product-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .cert-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 991px) {
  .about-split {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

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

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

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .section {
    padding-block: var(--space-8);
  }
}

@media (max-width: 767px) {
  :root {
    --fs-2xl: 1.7rem;
    --fs-3xl: 2.1rem;
  }

  .feature-grid,
  .product-grid,
  .process-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    min-height: 92vh;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .cta-banner {
    padding: var(--space-8) var(--space-5);
  }

  .page-hero h1 {
    font-size: var(--fs-2xl);
  }

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

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

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

  .cert-gallery {
    grid-template-columns: 1fr;
  }

  .back-top {
    right: var(--space-4);
    bottom: var(--space-4);
  }
}

/* ---------- 28. 辅助 ---------- */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--space-4); }
.mt-2 { margin-top: var(--space-6); }
.mt-3 { margin-top: var(--space-8); }
.mb-1 { margin-bottom: var(--space-4); }
.mb-2 { margin-bottom: var(--space-6); }

/* ---------- 29. 后台登录页 ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(120deg, rgba(8, 28, 51, 0.94) 0%, rgba(14, 42, 74, 0.86) 55%, rgba(18, 62, 107, 0.82) 100%),
    url("../assets/images/hero-bg.svg") center / cover no-repeat;
}

.login-main {
  flex: 1;
  display: grid;
  place-items: center;
  padding: calc(var(--header-height) + var(--space-8)) var(--space-5) var(--space-8);
}

.login-wrap {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
}

.login-card__head {
  text-align: center;
  margin-bottom: var(--space-6);
}

.login-card__logo {
  height: 40px;
  width: auto;
  margin: 0 auto var(--space-4);
}

.login-card__head h1 {
  font-size: var(--fs-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.login-card__head p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.login-card__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.login-card__form .btn {
  width: 100%;
  margin-top: var(--space-2);
}

.login-card__tip {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.login-card__back {
  text-align: center;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px dashed var(--color-border);
}

.login-card__back a {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

.login-card__back a:hover {
  color: var(--color-accent-dark);
}

/* 登录按钮（导航） */
.nav__login {
  padding: 0.55rem 1.2rem;
  font-size: var(--fs-sm);
}

@media (max-width: 991px) {
  .nav__login {
    margin-top: var(--space-5);
    text-align: center;
  }
}