/* =========================================================
   昶莱（上海）科技有限公司 - 全站通用样式 style.css
   主色：科技深蓝 / 强调：橙色
   ========================================================= */

:root {
  /* 主色：科技蓝 */
  --color-primary: #0f3d7d;
  --color-primary-dark: #0a2d5d;
  --color-primary-light: #2c5ea8;
  --color-primary-gradient: linear-gradient(135deg, #0f3d7d 0%, #1e5aa5 100%);

  /* 强调色：橙色 */
  --color-accent: #ff8a00;
  --color-accent-dark: #e67500;
  --color-accent-light: #ffa733;
  --color-accent-gradient: linear-gradient(135deg, #ff8a00 0%, #ffae33 100%);

  /* 中性灰阶 */
  --color-bg: #ffffff;
  --color-bg-alt: #f5f8fc;
  --color-bg-dark: #0c2750;
  --color-text: #222831;
  --color-text-soft: #555c68;
  --color-text-light: #8a94a3;
  --color-border: #e3e8ef;
  --color-border-soft: #eef2f7;
  --color-white: #ffffff;
  --color-black: #111111;

  /* 状态 */
  --color-success: #2ecc71;
  --color-error: #e74c3c;
  --color-warn: #f1c40f;

  /* 尺寸 */
  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 6px rgba(15, 61, 125, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 61, 125, 0.10);
  --shadow-lg: 0 16px 48px rgba(15, 61, 125, 0.14);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;

  /* 区块间距 */
  --section-pad-y: 80px;
}

/* ================= Reset ================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-primary); }
a:focus-visible { outline: 2px dashed var(--color-primary); outline-offset: 2px; border-radius: 3px; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 .6em; line-height: 1.35; color: var(--color-primary-dark); font-weight: 700; letter-spacing: .3px; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.2em; margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }
hr { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }

/* ================= 通用容器 ================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ================= 通用区块 ================= */
.section {
  padding: var(--section-pad-y) 0;
  position: relative;
}
.section--alt { background: var(--color-bg-alt); }
.section--blue { background: var(--color-primary-gradient); color: var(--color-white); }
.section--blue h2, .section--blue h3, .section--blue .section-title__en, .section--blue .section-title__cn { color: var(--color-white); }

/* 区块标题 */
.section-title {
  text-align: center;
  margin-bottom: 56px;
  position: relative;
}
.section-title__en {
  display: block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--color-accent);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 10px;
  opacity: .9;
}
.section-title__cn {
  display: block;
  font-size: 34px;
  color: var(--color-primary-dark);
  font-weight: 700;
  position: relative;
  padding-bottom: 18px;
}
.section-title__cn::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 48px; height: 3px;
  background: var(--color-accent-gradient);
  border-radius: 3px;
}
.section-title__sub {
  display: block;
  max-width: 720px;
  margin: 18px auto 0;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}
.section--left .section-title { text-align: left; }
.section--left .section-title__cn::after { left: 0; transform: none; }

/* ================= 通用按钮 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1.5px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-accent-gradient);
  color: var(--color-white);
  box-shadow: 0 6px 16px rgba(255, 138, 0, 0.28);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 138, 0, 0.36);
  color: var(--color-white);
}
.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.7);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--color-white);
  color: var(--color-white);
}
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.btn--white:hover {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn--sm { padding: 9px 20px; font-size: 14px; }
.btn--lg { padding: 14px 36px; font-size: 16px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none !important; }

/* 更多链接 */
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  transition: gap var(--transition-base), color var(--transition-base);
}
.more-link::after { content: "→"; }
.more-link:hover { color: var(--color-accent); gap: 10px; }
.section-more { text-align: center; margin-top: 40px; }

/* ================= 通用卡片 ================= */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-soft);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card__thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
  position: relative;
}
.card__thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.card:hover .card__thumb img { transform: scale(1.06); }
.card__body { padding: 20px 22px 22px; }
.card__tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(15, 61, 125, 0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}
.card__tag--accent { background: rgba(255, 138, 0, 0.12); color: var(--color-accent); }
.card__title {
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--color-primary-dark);
  line-height: 1.45;
}
.card__desc {
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__meta {
  color: var(--color-text-light);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border-soft);
}

/* ================= 网格工具 ================= */
.grid {
  display: grid;
  gap: 28px;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }
.grid--6 { grid-template-columns: repeat(6, 1fr); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

/* ================= Tab / Filter 工具 ================= */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  margin-bottom: 40px;
}
.tab-bar__item {
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}
.tab-bar__item:hover { color: var(--color-primary); border-color: var(--color-primary-light); }
.tab-bar__item.is-active {
  background: var(--color-primary-gradient);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 6px 16px rgba(15, 61, 125, 0.2);
}

/* ================= 表单工具 ================= */
.form-field {
  display: block;
  margin-bottom: 18px;
}
.form-field__label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--color-primary-dark);
  font-size: 14px;
}
.form-field__label .req { color: var(--color-error); margin-left: 2px; }
.form-field__input,
.form-field__textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: all var(--transition-base);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
}
.form-field__textarea { resize: vertical; min-height: 130px; }
.form-field__input:focus,
.form-field__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 61, 125, 0.12);
  background: #fbfdff;
}
.form-field__error {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--color-error);
  min-height: 1em;
}
.form-field.has-error .form-field__input,
.form-field.has-error .form-field__textarea {
  border-color: var(--color-error);
  background: #fff7f6;
}

/* ================= Toast ================= */
.toast {
  position: fixed;
  left: 50%;
  top: 96px;
  transform: translateX(-50%) translateY(-12px);
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--color-success);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 9999;
}
.toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast--error { background: var(--color-error); }

/* ================= 工具类 ================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.mt-0 { margin-top: 0 !important; } .mt-10 { margin-top: 10px; } .mt-20 { margin-top: 20px; } .mt-40 { margin-top: 40px; }
.mb-0 { margin-bottom: 0 !important; } .mb-10 { margin-bottom: 10px; } .mb-20 { margin-bottom: 20px; } .mb-40 { margin-bottom: 40px; }

/* ================= 响应式 ================= */
@media (max-width: 1199px) {
  :root { --container-max: 960px; --section-pad-y: 64px; }
  .grid--5 { grid-template-columns: repeat(4, 1fr); }
  .grid--6 { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 991px) {
  :root { --container-max: 720px; }
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
  .grid--6 { grid-template-columns: repeat(3, 1fr); }
  .section-title__cn { font-size: 28px; }
}
@media (max-width: 767px) {
  :root { --container-max: 100%; --section-pad-y: 48px; }
  body { font-size: 14.5px; }
  .grid--2, .grid--3, .grid--4, .grid--5, .grid--6 { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .section-title { margin-bottom: 36px; }
  .section-title__cn { font-size: 24px; }
  .section-title__en { font-size: 11px; letter-spacing: 2px; }
  .section-title__sub { font-size: 14px; }
  .btn { padding: 10px 22px; font-size: 14px; }
  .btn--lg { padding: 12px 26px; font-size: 15px; }
  .tab-bar { gap: 8px; margin-bottom: 24px; }
  .tab-bar__item { padding: 7px 16px; font-size: 13px; }
}
@media (max-width: 480px) {
  .grid--2, .grid--3, .grid--4, .grid--5, .grid--6 { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
}