/* ============================================================
   锦渚浮桥 · components.css（上）
   按钮 / 顶栏 / 导航 / 抽屉 / Hero 轮播
   ============================================================ */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 50px;
  font-size: .95rem; font-weight: 600; letter-spacing: .02em;
  transition: all var(--transition); white-space: nowrap;
}
.btn--primary { background: var(--grad-brand); color: #fff; box-shadow: 0 6px 18px rgba(11,111,166,.30); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(11,111,166,.40); }
.btn--gold { background: var(--grad-gold); color: #fff; box-shadow: 0 6px 18px rgba(209,138,34,.30); }
.btn--gold:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(209,138,34,.42); }
.btn--ghost { border: 1.5px solid rgba(255,255,255,.7); color: #fff; background: transparent; }
.btn--ghost:hover { background: rgba(255,255,255,.14); border-color: #fff; }
.btn--outline { border: 1.5px solid var(--brand-500); color: var(--brand-600); background: transparent; }
.btn--outline:hover { background: var(--brand-600); color: #fff; }
.btn--lg { padding: 16px 38px; font-size: 1.02rem; }
.btn .arrow { transition: transform var(--transition); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Top bar ---------- */
.topbar { background: var(--bg-deep); color: #b8cbd8; font-size: .85rem; }
.topbar__inner { display: flex; justify-content: space-between; align-items: center; height: 40px; }
.topbar a { color: #dbe9f2; }
.topbar a:hover { color: var(--accent-400); }
.topbar__slogan { letter-spacing: .06em; }
.topbar__right { display: flex; align-items: center; gap: 20px; }
.topbar__tel { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--accent-400) !important; font-size: .9rem; letter-spacing: .03em; }

/* ---------- Language switcher ---------- */
.topbar__lang { display: flex; align-items: center; gap: 8px; }
.lang-btn {
  background: none; border: none; cursor: pointer;
  color: #9db4c3; font-size: .85rem; font-weight: 600;
  padding: 3px 6px; border-radius: 4px;
  transition: color var(--transition), background var(--transition);
  letter-spacing: .04em;
}
.lang-btn:hover { color: #fff; background: rgba(255,255,255,.08); }
.lang-btn.is-active { color: var(--accent-400); background: rgba(255,255,255,.10); }
.lang-sep { color: #5a7386; font-size: .75rem; }

/* ---------- Header / Nav ---------- */
.header { position: sticky; top: 0; z-index: 100; background: #fff; box-shadow: var(--shadow-sm); }
.header__inner { display: flex; align-items: center; gap: 14px; height: 78px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo__mark {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--grad-brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.35rem; font-weight: 800; box-shadow: 0 4px 14px rgba(11,111,166,.35);
}
.logo__text { line-height: 1.25; }
.logo__text strong { display: block; font-size: 1.3rem; color: var(--ink-900); letter-spacing: .08em; }
.logo__text span { font-size: .72rem; color: var(--ink-400); letter-spacing: .22em; }

/* ---------- English mode (lang="en") 紧凑适配 ---------- */
html[lang="en"] .logo__mark { width: 42px; height: 42px; font-size: 1.1rem; }
html[lang="en"] .logo__text strong { font-size: 1.1rem; letter-spacing: .04em; }
html[lang="en"] .logo__text span { font-size: .58rem; letter-spacing: .14em; }
html[lang="en"] .nav__link { padding-left: 7px; padding-right: 7px; font-size: .88rem; }
html[lang="en"] .btn--gold { padding: 12px 20px; font-size: .9rem; }
html[lang="en"] .topbar__slogan { font-size: .78rem; letter-spacing: .02em; }
html[lang="en"] .hero__title { font-size: clamp(1.55rem, 4vw, 2.8rem); line-height: 1.24; }
html[lang="en"] .hero__desc { font-size: .98rem; line-height: 1.7; }

.nav { margin-left: auto; flex-shrink: 0; }
.nav__list { display: flex; gap: 0; }
.nav__item { position: relative; flex-shrink: 0; }
.nav__link {
  display: flex; align-items: center; gap: 4px;
  padding: 27px 9px; font-size: .95rem; font-weight: 600;
  color: var(--ink-700); position: relative; white-space: nowrap;
}
.nav__link::after {
  content: ""; position: absolute; left: 9px; right: 9px; bottom: 16px;
  height: 3px; border-radius: 2px; background: var(--grad-gold);
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.nav__link:hover, .nav__item.active > .nav__link { color: var(--brand-600); }
.nav__item.active > .nav__link::after, .nav__link:hover::after { transform: scaleX(1); }
.nav__caret { font-size: .65rem; color: var(--ink-400); transition: transform var(--transition); }
.nav__item:hover .nav__caret { transform: rotate(180deg); }

/* Dropdown */
.nav__drop {
  position: absolute; top: 100%; left: 0; min-width: 240px;
  background: #fff; border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow-lg); padding: 10px 0;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all var(--transition); border-top: 3px solid var(--brand-600);
}
.nav__item:hover .nav__drop { opacity: 1; visibility: visible; transform: translateY(0); }
.nav__drop a {
  display: block; padding: 11px 22px; font-size: .92rem; color: var(--ink-700);
  border-left: 3px solid transparent;
}
.nav__drop a:hover { color: var(--brand-600); background: var(--bg-soft); border-left-color: var(--brand-500); }

.header__cta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

/* Mobile nav toggle */
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 8px; border: 1px solid var(--line); position: relative; }
.nav-toggle span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--ink-900); border-radius: 2px; transition: all .3s; }
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle.open span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* Mobile drawer */
.drawer {
  position: fixed; inset: 0; z-index: 200; pointer-events: none;
}
.drawer__mask { position: absolute; inset: 0; background: rgba(6,45,69,.5); opacity: 0; transition: opacity .3s; }
.drawer__panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: min(320px, 82vw);
  background: #fff; padding: 24px; overflow-y: auto;
  transform: translateX(100%); transition: transform .35s cubic-bezier(.4,0,.2,1);
  box-shadow: var(--shadow-lg);
}
.drawer.open { pointer-events: auto; }
.drawer.open .drawer__mask { opacity: 1; }
.drawer.open .drawer__panel { transform: translateX(0); }
.drawer__head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.drawer__close { font-size: 1.6rem; color: var(--ink-500); line-height: 1; }
.drawer__item > a { display: block; padding: 14px 4px; font-weight: 600; color: var(--ink-900); border-bottom: 1px solid var(--line); }
.drawer__sub { padding: 4px 0 12px 16px; display: none; }
.drawer__sub.open { display: block; }
.drawer__sub a { display: block; padding: 8px 4px; color: var(--ink-500); font-size: .92rem; }
.drawer__sub a:hover { color: var(--brand-600); }

/* ---------- Hero slider ---------- */
.hero { position: relative; height: clamp(520px, 68vh, 720px); overflow: hidden; background: var(--bg-deep); }
.hero__slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
  display: flex; align-items: flex-end;
}
.hero__slide.active { opacity: 1; z-index: 1; }
.hero__bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.08); }
.hero__slide.active .hero__bg { animation: heroZoom 8s ease forwards; }
@keyframes heroZoom { from { transform: scale(1.08); } to { transform: scale(1); } }
.hero__veil { position: absolute; inset: 0; background: var(--grad-hero); }
.hero__content { position: relative; z-index: 2; color: #fff; max-width: 700px; padding-top: 20px; padding-bottom: 150px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: .85rem; letter-spacing: .22em; color: var(--accent-400);
  margin-bottom: 18px;
}
.hero__eyebrow::before { content: ""; width: 34px; height: 1.5px; background: var(--accent-400); }
.hero__title { color: #fff; font-size: clamp(1.9rem, 4.6vw, 3.4rem); font-weight: 800; line-height: 1.22; letter-spacing: .02em; overflow-wrap: break-word; }
.hero__title em { font-style: normal; color: var(--accent-400); }
.hero__desc { margin: 20px 0 32px; font-size: 1.06rem; color: #d5e4ee; max-width: 560px; line-height: 1.8; overflow-wrap: break-word; }
.hero__meta { display: flex; gap: 34px; margin-bottom: 38px; flex-wrap: wrap; }
.hero__meta .m { text-align: center; }
.hero__meta .m b { display: block; font-family: var(--font-num); font-size: 1.75rem; color: #fff; font-weight: 700; line-height: 1.2; }
.hero__meta .m span { font-size: .78rem; color: #9fbccd; letter-spacing: .1em; overflow-wrap: break-word; }
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; position: absolute; left: 0; bottom: 72px; }
.hero__cta .btn--lg { padding: 12px 28px; font-size: .92rem; }
.hero__arrows { position: absolute; bottom: 36px; right: 40px; z-index: 3; display: flex; gap: 10px; }
.hero__arrows button {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.5); color: #fff; font-size: 1.1rem;
  transition: all var(--transition);
}
.hero__arrows button:hover { background: var(--accent-500); border-color: var(--accent-500); }
.hero__dots { position: absolute; bottom: 52px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; gap: 10px; }
.hero__dots span { width: 30px; height: 3px; border-radius: 2px; background: rgba(255,255,255,.4); cursor: pointer; transition: background var(--transition); }
.hero__dots span.active { background: var(--accent-500); }
.hero__scroll {
  position: absolute; bottom: 40px; right: 100px; z-index: 3;
  color: rgba(255,255,255,.75); font-size: .8rem; letter-spacing: .2em;
  display: flex; align-items: center; gap: 10px;
  writing-mode: vertical-rl;
}
.hero__scroll::after { content: ""; width: 1px; height: 42px; background: linear-gradient(rgba(255,255,255,.7), transparent); }