/* ============================================================
   components.css —— 公共组件
   按钮 / 徽标 / 顶部条 / 头部 / 导航 / Mega菜单 / 抽屉
   面包屑 / 卡片 / 指标 / CTA / 表单 / FAQ / 时间轴 / 表格 / 页脚
   ============================================================ */

/* ============================================================
   1. 按钮
   ============================================================ */
.btn {
  --btn-py: 12px;
  --btn-px: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: var(--btn-py) var(--btn-px);
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 6px 18px rgba(26, 111, 212, .28);
}
.btn--primary:hover { color: #fff; box-shadow: 0 12px 28px rgba(26, 111, 212, .36); }

.btn--tech {
  background: var(--grad-tech);
  color: #fff;
  box-shadow: 0 6px 18px rgba(76, 60, 232, .26);
}
.btn--tech:hover { color: #fff; box-shadow: 0 12px 28px rgba(76, 60, 232, .34); }

.btn--gold {
  background: var(--grad-gold);
  color: #4A3400;
  box-shadow: 0 6px 18px rgba(245, 185, 33, .30);
}
.btn--gold:hover { color: #4A3400; }

.btn--ghost {
  background: transparent;
  border-color: var(--c-line-strong);
  color: var(--t-1);
}
.btn--ghost:hover { border-color: var(--c-blue); color: var(--c-blue); background: var(--c-blue-50); }

.btn--onDark {
  background: rgba(255, 255, 255, .10);
  border-color: rgba(255, 255, 255, .28);
  color: #fff;
  backdrop-filter: blur(6px);
}
.btn--onDark:hover { background: rgba(255, 255, 255, .18); color: #fff; border-color: rgba(255, 255, 255, .5); }

.btn--white { background: #fff; color: var(--c-blue-900); box-shadow: var(--sh-2); }
.btn--white:hover { color: var(--c-blue-900); box-shadow: var(--sh-3); }

.btn--lg { --btn-py: 15px; --btn-px: 30px; font-size: 15px; }
.btn--sm { --btn-py: 9px; --btn-px: 16px; font-size: var(--fs-xs); }
.btn--block { width: 100%; }

.btn--link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0; background: none; border: 0; border-radius: 0;
  color: var(--c-blue); font-weight: 600;
}
.btn--link .arrow { transition: transform var(--t-fast) var(--ease); }
.btn--link:hover { background: none; color: var(--c-blue-700); }
.btn--link:hover .arrow { transform: translateX(4px); }

.arrow { flex: none; }

/* ============================================================
   2. 徽标
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}
.badge--rd { background: var(--c-gold-100); color: #8A5B00; }
.badge--innov { background: rgba(76, 60, 232, .10); color: var(--c-violet); }
.badge--overseas { background: var(--c-green-100); color: var(--c-green-600); }
.badge--new { background: var(--c-blue-100); color: var(--c-blue-700); }
.badge--dot::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ============================================================
   3. 顶部工具条
   ============================================================ */
.topbar {
  background: var(--c-ink-900);
  color: var(--t-on-dark-2);
  font-size: var(--fs-xs);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  height: 38px;
}
.topbar__slogan { display: flex; align-items: center; gap: 8px; }
.topbar__slogan .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 8px var(--c-gold);
}
.topbar__right { display: flex; align-items: center; gap: var(--sp-5); }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; color: var(--t-on-dark-2); }
.topbar__item:hover { color: #fff; }
.topbar__item strong { color: #fff; font-weight: 600; letter-spacing: .02em; }

/* ============================================================
   4. 头部 + 导航
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.header.is-stuck { box-shadow: 0 6px 24px rgba(10, 26, 47, .08); }

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  height: 76px;
}

/* LOGO */
.brand { display: inline-flex; align-items: center; flex: none; }
.brand__img { height: 76px; width: auto; }
.brand--footer .brand__img { height: 52px; }

/* 导航 */
.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav__item { position: relative; }
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 14px;
  border-radius: var(--r-md);
  font-size: 15px;
  font-weight: 600;
  color: var(--t-1);
  white-space: nowrap;
}
.nav__link:hover { color: var(--c-blue); background: var(--c-blue-50); }
.nav__link.is-active { color: var(--c-blue); }
.nav__link .caret { transition: transform var(--t-fast) var(--ease); }
.nav__item:hover .nav__link .caret { transform: rotate(180deg); }
.nav__link--plain { padding: 10px 12px; }

/* 头部右侧动作区 */
.header__actions { display: flex; align-items: center; gap: var(--sp-3); flex: none; }

/* 语言切换 */
.lang {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: var(--r-full);
  background: var(--c-bg-soft-2);
  border: 1px solid var(--c-line);
}
.lang__btn {
  padding: 5px 13px;
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--t-2);
  transition: all var(--t-fast) var(--ease);
}
.lang__btn.is-active { background: #fff; color: var(--c-blue); box-shadow: var(--sh-1); }

/* 汉堡按钮 */
.burger {
  display: none;
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
  background: #fff;
  align-items: center;
  justify-content: center;
}
.burger span {
  position: relative;
  display: block;
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--t-1);
}
.burger span::before, .burger span::after {
  content: "";
  position: absolute; left: 0;
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--t-1);
  transition: transform var(--t-mid) var(--ease);
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }

/* ============================================================
   5. Mega 菜单（业务板块 5 组 12 项）
   ============================================================ */
.mega {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(1080px, calc(100vw - 48px));
  padding: var(--sp-6);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  box-shadow: 0 24px 60px rgba(10, 26, 47, .16);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease),
              visibility var(--t-mid);
  z-index: var(--z-mega);
}
.nav__item:hover .mega,
.nav__item:focus-within .mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.mega__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-5);
}
.mega__group { min-width: 0; }
.mega__title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--c-blue);
  padding-bottom: var(--sp-3);
  margin-bottom: var(--sp-3);
  border-bottom: 1px solid var(--c-line);
}
.mega__title .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 5px;
  background: var(--grad-main);
  color: #fff;
  font-size: 10px;
  font-weight: 800;
}
.mega__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  margin: 0 -10px;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  color: var(--t-2);
  line-height: 1.4;
  transition: all var(--t-fast) var(--ease);
}
.mega__link:hover { background: var(--c-blue-50); color: var(--c-blue); }
.mega__link .idx {
  flex: none;
  width: 17px; height: 17px;
  border-radius: 4px;
  background: var(--c-bg-soft-2);
  color: var(--t-3);
  font-size: 10px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.mega__link:hover .idx { background: var(--c-blue); color: #fff; }

.mega__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-line);
  font-size: var(--fs-sm);
  color: var(--t-2);
}

/* ============================================================
   6. 移动端抽屉
   ============================================================ */
.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  visibility: hidden;
  pointer-events: none;
}
.drawer.is-open { visibility: visible; pointer-events: auto; }
.drawer__mask {
  position: absolute; inset: 0;
  background: rgba(10, 26, 47, .5);
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease);
}
.drawer.is-open .drawer__mask { opacity: 1; }
.drawer__panel {
  position: absolute;
  top: 0; right: 0;
  width: min(360px, 88vw);
  height: 100%;
  background: #fff;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--t-slow) var(--ease-out);
  overflow-y: auto;
}
.drawer.is-open .drawer__panel { transform: none; }
.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--c-line);
}
.drawer__close {
  width: 38px; height: 38px;
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--t-2);
}
.drawer__body { padding: var(--sp-4) var(--sp-5) var(--sp-7); }
.drawer__nav { display: flex; flex-direction: column; }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 15px;
  font-weight: 600;
  color: var(--t-1);
}
.drawer__link:hover { color: var(--c-blue); }
.drawer__group { border-bottom: 1px solid var(--c-line); }
.drawer__group-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--t-1);
  text-align: left;
}
.drawer__sub { display: none; padding: 0 0 12px; }
.drawer__group.is-open .drawer__sub { display: block; }
.drawer__sublink {
  display: block;
  padding: 9px 0 9px 14px;
  border-left: 2px solid var(--c-line);
  font-size: var(--fs-sm);
  color: var(--t-2);
}
.drawer__sublink:hover { color: var(--c-blue); border-left-color: var(--c-blue); }
.drawer__cta { display: flex; flex-direction: column; gap: var(--sp-3); margin-top: var(--sp-5); }

/* ============================================================
   7. 面包屑
   ============================================================ */
.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: var(--fs-sm);
  color: var(--t-3);
  padding: var(--sp-4) 0;
}
.crumb a { color: var(--t-2); }
.crumb a:hover { color: var(--c-blue); }
.crumb .sep { color: var(--c-line-strong); }
.crumb .cur { color: var(--t-1); font-weight: 600; }

/* ============================================================
   8. 卡片
   ============================================================ */
.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  transition: transform var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease),
              border-color var(--t-mid) var(--ease);
}
.card--hover:hover {
  transform: translateY(-4px);
  border-color: var(--c-blue-200);
  box-shadow: var(--sh-3);
}
.card--soft { background: var(--c-bg-soft); border-color: transparent; }

/* 业务宫格卡片 */
.biz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding: var(--sp-5);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease),
              border-color var(--t-mid) var(--ease);
}
.biz-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad-main);
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease);
}
.biz-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-blue-200);
  box-shadow: var(--sh-3);
}
.biz-card:hover::before { opacity: 1; }
.biz-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
}
.biz-card__icon {
  flex: none;
  width: 46px; height: 46px;
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-blue-50);
  color: var(--c-blue);
}
.biz-card__icon svg { width: 24px; height: 24px; }
.biz-card__icon--green { background: var(--c-green-100); color: var(--c-green-600); }
.biz-card__icon--gold { background: var(--c-gold-100); color: var(--c-gold-600); }
.biz-card__icon--tech { background: rgba(76, 60, 232, .09); color: var(--c-violet); }
.biz-card__icon--dark { background: var(--c-ink-800); color: #fff; }
.biz-card__num {
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 800;
  color: var(--c-line-strong);
  line-height: 1;
}
.biz-card__title { font-size: var(--fs-h4); font-weight: 700; margin: 0; }
.biz-card__title a { color: inherit; }
.biz-card__title a:hover { color: var(--c-blue); }
.biz-card__desc { font-size: var(--fs-sm); color: var(--t-2); margin: 0; }
.biz-card__more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-blue);
}
.biz-card__more .arrow { transition: transform var(--t-fast) var(--ease); }
.biz-card:hover .biz-card__more .arrow { transform: translateX(4px); }

/* 分组标题 */
.group-head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin: var(--sp-7) 0 var(--sp-5);
}
.group-head:first-child { margin-top: 0; }
.group-head__num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 10px;
  background: var(--grad-main);
  color: #fff;
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 800;
}
.group-head__title { font-size: 19px; font-weight: 800; margin: 0; }
.group-head__line { flex: 1; height: 1px; background: var(--c-line); }

/* 特性卡 */
.feat-card {
  padding: var(--sp-6) var(--sp-5);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  transition: transform var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--sh-3); }
.feat-card__icon {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-main);
  color: #fff;
  margin-bottom: var(--sp-4);
}
.feat-card__icon svg { width: 26px; height: 26px; }
.feat-card__title { font-size: var(--fs-h4); font-weight: 700; margin-bottom: var(--sp-2); }
.feat-card__desc { font-size: var(--fs-sm); color: var(--t-2); margin: 0; }

/* 数据/指标 */
.metric { display: flex; flex-direction: column; gap: 4px; }
.metric__val {
  font-family: var(--font-num);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric__label { font-size: var(--fs-sm); color: var(--t-2); }
.section--dark .metric__label { color: var(--t-on-dark-2); }
.section--dark .metric__val {
  background: linear-gradient(135deg, #7FD0FF, #6BE3AC);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ============================================================
   9. CTA 条
   ============================================================ */
.cta-band {
  position: relative;
  overflow: hidden;
  background: var(--grad-main);
  border-radius: var(--r-2xl);
  padding: clamp(32px, 4vw, 56px);
  color: #fff;
}
.cta-band::after {
  content: "";
  position: absolute;
  right: -80px; top: -80px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, .22), transparent 65%);
  pointer-events: none;
}
.cta-band__title { font-size: var(--fs-h2); font-weight: 800; color: #fff; margin-bottom: var(--sp-3); }
.cta-band__desc { color: rgba(255, 255, 255, .86); margin-bottom: var(--sp-5); max-width: 620px; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

/* 页内 CTA 条（深色） */
.cta-band--dark { background: var(--grad-dark); }
.cta-band--dark::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--grad-tech);
  opacity: .30;
}

/* ============================================================
   10. 表单
   ============================================================ */
.field { display: flex; flex-direction: column; gap: 7px; }
.field__label { font-size: var(--fs-sm); font-weight: 600; color: var(--t-1); }
.field__label .req { color: #E5484D; margin-left: 2px; }
.input, .select, .textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  color: var(--t-1);
  background: #fff;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-md);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.textarea { min-height: 120px; resize: vertical; }
.select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238A94A6' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--c-blue);
  box-shadow: 0 0 0 3px rgba(26, 111, 212, .14);
}
.input.is-error, .textarea.is-error { border-color: #E5484D; }
.field__err { font-size: var(--fs-xs); color: #E5484D; min-height: 16px; }

.check {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: var(--fs-sm);
  color: var(--t-2);
  cursor: pointer;
  line-height: 1.6;
}
.check input { margin-top: 4px; flex: none; accent-color: var(--c-blue); width: 15px; height: 15px; }
.check a { text-decoration: underline; }

/* ============================================================
   11. FAQ
   ============================================================ */
.faq { display: flex; flex-direction: column; gap: var(--sp-3); }
.faq__item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease);
}
.faq__item.is-open { border-color: var(--c-blue-200); }
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  width: 100%;
  padding: var(--sp-4) var(--sp-5);
  font-size: 15px;
  font-weight: 600;
  color: var(--t-1);
  text-align: left;
}
.faq__q:hover { color: var(--c-blue); }
.faq__q .ico {
  flex: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--c-bg-soft-2);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--t-2);
  transition: transform var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.faq__item.is-open .faq__q .ico { transform: rotate(45deg); background: var(--c-blue); color: #fff; }
.faq__a {
  display: none;
  padding: 0 var(--sp-5) var(--sp-5);
  font-size: var(--fs-sm);
  color: var(--t-2);
  line-height: 1.8;
}
.faq__item.is-open .faq__a { display: block; }

/* ============================================================
   12. 时间轴 / 步骤
   ============================================================ */
.steps { display: grid; grid-template-columns: repeat(7, 1fr); gap: var(--sp-4); counter-reset: step; }
.step { position: relative; padding-top: 44px; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  left: 0; top: 0;
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 800;
  color: var(--c-blue);
}
.step::after {
  content: "";
  position: absolute;
  left: 0; top: 34px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-green));
  opacity: .3;
}
.step__title { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.step__desc { font-size: var(--fs-xs); color: var(--t-3); margin: 0; }

/* ============================================================
   13. 表格
   ============================================================ */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--r-lg); background: #fff; }
.tbl { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.tbl thead th {
  background: var(--c-bg-soft);
  color: var(--t-1);
  font-weight: 700;
  text-align: left;
  padding: 13px var(--sp-4);
  border-bottom: 1px solid var(--c-line);
  white-space: nowrap;
}
.tbl tbody td { padding: 13px var(--sp-4); border-bottom: 1px solid var(--c-line); color: var(--t-2); vertical-align: top; }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover { background: var(--c-blue-50); }
.tbl .num { font-family: var(--font-num); font-weight: 700; color: var(--c-blue-700); white-space: nowrap; }

/* ============================================================
   14. 页脚
   ============================================================ */
.footer { background: var(--grad-dark); color: var(--t-on-dark-2); }
.footer__main {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1.1fr;
  gap: var(--sp-7);
  padding: var(--sp-9) 0 var(--sp-8);
}
.footer__brand .brand__wrap {
  display: inline-block;
  padding: var(--sp-3) var(--sp-4);
  background: #fff;
  border-radius: var(--r-md);
  margin-bottom: var(--sp-4);
}
.footer__slogan { font-size: 15px; color: #fff; font-weight: 600; margin-bottom: var(--sp-2); }
.footer__desc { font-size: var(--fs-sm); color: var(--t-on-dark-3); max-width: 300px; }
.footer__title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--sp-4);
}
.footer__list { display: flex; flex-direction: column; gap: 11px; }
.footer__list a { font-size: var(--fs-sm); color: var(--t-on-dark-2); }
.footer__list a:hover { color: #fff; }

.footer__group-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-blue-400);
  margin: var(--sp-4) 0 var(--sp-2);
}
.footer__group-label:first-child { margin-top: 0; }

/* 社交媒体 */
.social { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.social__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .12);
  font-size: var(--fs-xs);
  color: var(--t-on-dark-2);
  transition: all var(--t-fast) var(--ease);
}
.social__item:hover { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .3); }
.social__item svg { width: 15px; height: 15px; }
.social__item--pending { opacity: .62; border-style: dashed; }
.social__item--pending .soon {
  padding: 1px 6px;
  border-radius: var(--r-full);
  background: rgba(245, 185, 33, .18);
  color: var(--c-gold);
  font-size: 10px;
  font-weight: 700;
}

/* 页脚底栏 */
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .09);
  padding: var(--sp-5) 0 var(--sp-6);
}
.footer__corp {
  font-size: var(--fs-xs);
  line-height: 2;
  color: var(--t-on-dark-3);
}
.footer__corp strong { color: var(--t-on-dark); font-weight: 600; }
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
  font-size: var(--fs-xs);
  color: var(--t-on-dark-3);
}
.footer__legal a { color: var(--t-on-dark-3); }
.footer__legal a:hover { color: #fff; }
.footer__legal .divider { width: 1px; height: 12px; background: rgba(255, 255, 255, .16); }

/* ============================================================
   15. 回到顶部 / 移动底栏 / Toast
   ============================================================ */
.to-top {
  position: fixed;
  right: 24px; bottom: 28px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--c-line);
  box-shadow: var(--sh-2);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-blue);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--t-mid) var(--ease);
  z-index: 60;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { box-shadow: var(--sh-3); transform: translateY(-2px); }

.mobile-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: none;
  align-items: stretch;
  background: #fff;
  border-top: 1px solid var(--c-line);
  box-shadow: 0 -4px 20px rgba(10, 26, 47, .10);
  z-index: 90;
  padding-bottom: env(safe-area-inset-bottom);
}
.mobile-bar__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 9px 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--t-2);
}
.mobile-bar__item svg { width: 20px; height: 20px; }
.mobile-bar__item--primary {
  background: var(--grad-main);
  color: #fff;
  flex: 1.5;
}
.mobile-bar__item--primary:hover { color: #fff; }

.toast {
  position: fixed;
  left: 50%; bottom: 90px;
  transform: translateX(-50%) translateY(16px);
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 13px 22px;
  background: var(--c-ink-900);
  color: #fff;
  border-radius: var(--r-full);
  box-shadow: var(--sh-4);
  font-size: var(--fs-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--t-mid) var(--ease-out);
  max-width: calc(100vw - 32px);
}
.toast.is-show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.toast--ok { background: #12603C; }
.toast--err { background: #9B2226; }