/* ==========================================================================
   浪元信息 (Langyuan Information) — Corporate Portal Stylesheet
   ========================================================================== */

:root {
  /* Brand palette */
  --c-navy: #0b1f3a;
  --c-navy-2: #0f2a55;
  --c-primary: #2563eb;
  --c-primary-dark: #1d4ed8;
  --c-accent: #06b6d4;
  --c-accent-2: #22d3ee;

  /* Neutrals */
  --c-ink: #0f172a;
  --c-text: #334155;
  --c-muted: #64748b;
  --c-line: #e2e8f0;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f8fc;
  --c-bg-soft-2: #eef3fb;
  --c-white: #ffffff;

  /* Effects */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, .10), 0 8px 10px -6px rgba(15, 23, 42, .06);
  --shadow-lg: 0 24px 48px -12px rgba(15, 23, 42, .18);
  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1180px;
  --header-h: 70px;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
ul { list-style: none; }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.25; font-weight: 700; }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--navy {
  background: linear-gradient(160deg, var(--c-navy) 0%, var(--c-navy-2) 100%);
  color: #cdd9ee;
}
.section--navy h2, .section--navy h3 { color: #fff; }
.section-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--c-primary);
  background: var(--c-bg-soft-2); padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.section--navy .eyebrow { color: var(--c-accent-2); background: rgba(34, 211, 238, .12); }
.section-title { font-size: clamp(1.7rem, 3.4vw, 2.5rem); letter-spacing: -.01em; }
.section-sub { margin-top: 16px; color: var(--c-muted); font-size: 1.05rem; }
.section--navy .section-sub { color: #aab9d4; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-weight: 600; font-size: .98rem; padding: 13px 26px; border-radius: 999px;
  border: 1px solid transparent; transition: all .22s var(--ease); white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 120%);
  color: #fff; box-shadow: 0 8px 20px -6px rgba(37, 99, 235, .5);
}
.btn--primary:hover { box-shadow: 0 12px 26px -6px rgba(37, 99, 235, .6); transform: translateY(-2px); color: #fff; }
.btn--ghost { background: rgba(255, 255, 255, .08); color: #fff; border-color: rgba(255, 255, 255, .35); }
.btn--ghost:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.btn--outline { background: #fff; color: var(--c-primary); border-color: var(--c-line); }
.btn--outline:hover { border-color: var(--c-primary); color: var(--c-primary-dark); }
.btn--lg { padding: 16px 34px; font-size: 1.05rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--header-h);
  background: rgba(255, 255, 255, .85); backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-line); transition: box-shadow .3s var(--ease);
}
.site-header.is-scrolled { box-shadow: var(--shadow-sm); }
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: var(--c-ink); font-size: 1.18rem; }
.brand__logo {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 1.15rem;
  box-shadow: 0 6px 14px -4px rgba(37, 99, 235, .5);
}
.brand__name { line-height: 1.1; }
.brand__name small { display: block; font-size: .62rem; font-weight: 600; letter-spacing: .18em; color: var(--c-muted); text-transform: uppercase; }

.nav__menu { display: flex; align-items: center; gap: 4px; }
.nav__item { position: relative; }
.nav__link {
  display: flex; align-items: center; gap: 5px; padding: 9px 15px; border-radius: 9px;
  font-weight: 500; color: var(--c-text); font-size: .96rem;
}
.nav__link:hover { color: var(--c-primary); background: var(--c-bg-soft); }
.nav__item.is-active > .nav__link { color: var(--c-primary); font-weight: 600; }
.nav__caret { width: 9px; height: 9px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg) translateY(-2px); transition: transform .2s var(--ease); }
.nav__item--has-drop:hover .nav__caret { transform: rotate(225deg) translateY(2px); }

/* Dropdown */
.nav__drop {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 280px; background: #fff; border: 1px solid var(--c-line); border-radius: 16px;
  box-shadow: var(--shadow-lg); padding: 10px; opacity: 0; visibility: hidden; transition: all .22s var(--ease);
}
.nav__item--has-drop:hover .nav__drop { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav__drop::before { content: ""; position: absolute; top: -10px; left: 0; right: 0; height: 10px; }
.drop-link { display: flex; gap: 12px; align-items: flex-start; padding: 11px 13px; border-radius: 11px; }
.drop-link:hover { background: var(--c-bg-soft); }
.drop-link__ic { font-size: 1.25rem; line-height: 1; margin-top: 2px; }
.drop-link__t { font-weight: 600; color: var(--c-ink); font-size: .94rem; }
.drop-link__d { font-size: .8rem; color: var(--c-muted); margin-top: 2px; }

.nav__cta { display: flex; align-items: center; gap: 12px; }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__toggle span { width: 24px; height: 2px; background: var(--c-ink); border-radius: 2px; transition: all .25s var(--ease); }
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #e8eefb;
  background: linear-gradient(155deg, #0b1f3a 0%, #11315f 55%, #0d2748 100%);
  padding: clamp(70px, 10vw, 130px) 0 clamp(80px, 11vw, 140px);
}
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; z-index: 0; }
.hero::before { width: 520px; height: 520px; background: radial-gradient(circle, #2563eb 0%, transparent 70%); top: -160px; right: -120px; }
.hero::after { width: 460px; height: 460px; background: radial-gradient(circle, #06b6d4 0%, transparent 70%); bottom: -180px; left: -130px; }
.hero__grid-bg { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%); z-index: 0; }
.hero .container { position: relative; z-index: 1; }
.hero__inner { max-width: 820px; margin: 0 auto; text-align: center; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: .85rem; font-weight: 600;
  color: #bfe9f5; background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .25);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 26px;
}
.hero__eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-accent-2); box-shadow: 0 0 0 4px rgba(34,211,238,.2); }
.hero h1 { color: #fff; font-size: clamp(2.1rem, 5.2vw, 3.6rem); letter-spacing: -.02em; line-height: 1.15; }
.hero h1 .grad { background: linear-gradient(120deg, #22d3ee, #60a5fa); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero__sub { margin: 24px auto 0; max-width: 640px; font-size: clamp(1rem, 2vw, 1.22rem); color: #b9c7e2; }
.hero__actions { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero--page { padding: clamp(60px, 8vw, 96px) 0; }
.hero--page .hero__inner { text-align: center; }
.hero__crumbs { font-size: .9rem; color: #9fb2d4; margin-bottom: 18px; }
.hero__crumbs a:hover { color: #fff; }

/* ---------- Grid + Cards ---------- */
.grid { display: grid; gap: 26px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 32px 28px; transition: all .3s var(--ease); height: 100%;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #cbd9f3; }
.card__ic {
  width: 56px; height: 56px; border-radius: 15px; display: grid; place-items: center;
  font-size: 1.7rem; margin-bottom: 20px;
  background: linear-gradient(135deg, var(--c-bg-soft-2), #fff); border: 1px solid var(--c-line);
}
.card__title { font-size: 1.22rem; margin-bottom: 10px; }
.card__title a:hover { color: var(--c-primary); }
.card__text { color: var(--c-muted); font-size: .96rem; }
.card__more { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font-weight: 600; color: var(--c-primary); font-size: .92rem; }
.card__more .arr { transition: transform .2s var(--ease); }
.card:hover .card__more .arr { transform: translateX(4px); }

/* Service card (feature, accent top) */
.svc-card { position: relative; overflow: hidden; }
.svc-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.svc-card:hover::before { transform: scaleX(1); }

/* Feature list */
.feature-list { display: grid; gap: 16px; }
.feature-list li { display: flex; gap: 14px; align-items: flex-start; }
.feature-list .fl-ic { flex: none; width: 26px; height: 26px; border-radius: 8px; background: var(--c-bg-soft-2); color: var(--c-primary); display: grid; place-items: center; font-weight: 800; font-size: .85rem; margin-top: 3px; }
.feature-list .fl-t { font-weight: 600; color: var(--c-ink); }
.feature-list .fl-d { color: var(--c-muted); font-size: .94rem; }

/* Split (text + visual) */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split--rev .split__media { order: -1; }
.split__media {
  border-radius: var(--radius-lg); min-height: 320px; position: relative; overflow: hidden;
  background: linear-gradient(150deg, #0f2a55, #1e3a8a); display: grid; place-items: center;
  color: #cfe0ff; font-size: 5rem; box-shadow: var(--shadow-md);
}
.split__media .panel-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 32px 32px; }
.split h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 18px; }
.split p { color: var(--c-text); margin-bottom: 16px; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
.stat__num { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; background: linear-gradient(120deg, #22d3ee, #60a5fa); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__label { color: #aab9d4; margin-top: 6px; font-size: .95rem; }

/* Process steps */
.steps { counter-reset: step; display: grid; gap: 26px; }
.step { position: relative; padding-left: 70px; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 0; width: 50px; height: 50px; border-radius: 14px;
  display: grid; place-items: center; font-weight: 800; color: #fff; font-size: 1.05rem;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
}
.step h4 { font-size: 1.12rem; margin-bottom: 6px; }
.step p { color: var(--c-muted); font-size: .96rem; }

/* Tag pills */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag { font-size: .86rem; font-weight: 600; color: var(--c-primary); background: var(--c-bg-soft-2); padding: 7px 15px; border-radius: 999px; border: 1px solid #dbe6fb; }

/* Notice / compliance callout */
.notice {
  display: flex; gap: 16px; align-items: flex-start; padding: 22px 24px; border-radius: var(--radius);
  background: #fffbeb; border: 1px solid #fde68a; color: #78510a;
}
.notice--info { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }
.notice__ic { font-size: 1.4rem; line-height: 1; }
.notice__t { font-weight: 700; margin-bottom: 4px; color: inherit; }
.notice p { font-size: .94rem; color: inherit; }

/* CTA band */
.cta-band { text-align: center; }
.cta-band h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.cta-band p { margin: 16px auto 0; max-width: 560px; color: #b9c7e2; }
.cta-band .hero__actions { margin-top: 34px; }

/* Prose (article-like content) */
.prose h2 { font-size: 1.6rem; margin: 40px 0 16px; }
.prose h3 { font-size: 1.25rem; margin: 30px 0 12px; }
.prose p { margin-bottom: 16px; }
.prose ul.bul { margin: 0 0 18px; display: grid; gap: 10px; }
.prose ul.bul li { position: relative; padding-left: 26px; color: var(--c-text); }
.prose ul.bul li::before { content: ""; position: absolute; left: 4px; top: 11px; width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
.info-row { display: flex; gap: 16px; align-items: flex-start; padding: 18px 0; border-bottom: 1px dashed var(--c-line); }
.info-row:last-child { border-bottom: 0; }
.info-row__ic { width: 46px; height: 46px; flex: none; border-radius: 12px; background: var(--c-bg-soft-2); display: grid; place-items: center; font-size: 1.3rem; }
.info-row__t { font-weight: 700; color: var(--c-ink); }
.info-row__d { color: var(--c-muted); font-size: .95rem; }
.form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; color: var(--c-ink); margin-bottom: 7px; font-size: .92rem; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: 11px;
  font: inherit; color: var(--c-ink); background: var(--c-bg-soft); transition: all .2s var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--c-primary); background: #fff; box-shadow: 0 0 0 4px rgba(37,99,235,.12); }
.field textarea { resize: vertical; min-height: 120px; }
.form__note { font-size: .85rem; color: var(--c-muted); margin-top: 10px; }

/* ---------- Footer ---------- */
.site-footer { background: #081729; color: #93a4c2; padding: 70px 0 28px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { max-width: 320px; color: #8295b6; }
.footer-col h4 { color: #fff; font-size: .98rem; margin-bottom: 18px; }
.footer-col li { margin-bottom: 11px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { padding-top: 24px; display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; color: #6f82a6; font-size: .85rem; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom__links { display: flex; gap: 18px; flex-wrap: wrap; }
.scope-note { font-size: .8rem; color: #5f7398; margin-top: 14px; line-height: 1.6; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- To-top button ---------- */
.to-top { position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); color: #fff; font-size: 1.2rem; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s var(--ease); z-index: 90; }
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 36px 28px; }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .split--rev .split__media { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .nav__toggle { display: flex; }
  .nav__menu {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--c-line); padding: 12px; gap: 2px;
    box-shadow: var(--shadow-lg); transform: translateY(-130%); transition: transform .3s var(--ease);
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .nav.is-open .nav__menu { transform: translateY(0); }
  .nav__link { padding: 13px 14px; border-radius: 10px; font-size: 1rem; }
  .nav__drop {
    position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none;
    border: 0; border-left: 2px solid var(--c-line); border-radius: 0; margin: 4px 0 8px 16px;
    padding: 2px 0; min-width: 0; display: none;
  }
  .nav__item--has-drop.is-expanded .nav__drop { display: block; }
  .nav__cta .btn--primary { display: none; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { justify-content: center; }
}