/* ============================================================
   算能雲 ComputeNova — 香港風格企業官網
   字體：Noto Sans HK / Noto Serif HK（香港本地繁體字型）
   配色：深藍墨 + 科技青 + 暖金
   ============================================================ */

:root {
  --ink: #0b1f3a;          /* 深藍墨 */
  --ink-2: #12305c;
  --navy: #0a2342;
  --blue: #1b6ef3;         /* 主藍 */
  --cyan: #16d3c6;         /* 科技青 */
  --gold: #c9a24b;         /* 暖金（高端點綴）*/
  --paper: #f5f7fb;        /* 淺底 */
  --white: #ffffff;
  --line: #e3e8f0;
  --text: #1f2a3a;
  --muted: #5b6b82;
  --radius: 16px;
  --shadow: 0 18px 48px -22px rgba(11, 31, 58, .35);
  --shadow-sm: 0 8px 24px -16px rgba(11, 31, 58, .4);
  --sans: "Noto Sans HK", "PingFang HK", "PingFang TC", "Helvetica Neue", Arial, sans-serif;
  --serif: "Noto Serif HK", "PingFang HK", Georgia, serif;
  --en: "Inter", "Noto Sans HK", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container { width: min(1180px, 92vw); margin-inline: auto; }

a { color: inherit; text-decoration: none; }

/* ---------- 頂部條 ---------- */
.topbar {
  background: var(--navy);
  color: #cdd9ec;
  font-size: .8rem;
  letter-spacing: .02em;
}
.topbar__inner {
  display: flex; justify-content: space-between; align-items: center;
  padding: 7px 0;
}
.topbar__right { color: #9fb3d1; }

/* ---------- 導航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand__mark { display: grid; place-items: center; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__text strong { font-family: var(--serif); font-weight: 700; font-size: 1.18rem; color: var(--ink); letter-spacing: .04em; }
.brand__text em { font-style: normal; font-family: var(--en); font-size: .68rem; letter-spacing: .22em; color: var(--blue); text-transform: uppercase; }
.brand--light .brand__text strong { color: #fff; }
.brand--light .brand__text em { color: var(--cyan); }

.nav__links { display: flex; align-items: center; gap: 26px; }
.nav__links a {
  font-size: .95rem; font-weight: 500; color: var(--ink);
  display: inline-flex; flex-direction: column; line-height: 1.1;
  position: relative; padding: 4px 0;
}
.nav__links a i { font-style: normal; font-family: var(--en); font-size: .6rem; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; }
.nav__links a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--blue), var(--cyan)); transition: width .25s ease;
}
.nav__links a:not(.nav__cta):hover::after { width: 100%; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: .95rem;
  padding: 12px 22px; border-radius: 999px; cursor: pointer; border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn--primary { background: linear-gradient(135deg, var(--blue), var(--cyan)); color: #fff; box-shadow: 0 12px 28px -12px rgba(27,110,243,.7); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -12px rgba(27,110,243,.8); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn--block { width: 100%; }
.nav__cta { padding: 9px 18px; }

.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(--ink); border-radius: 2px; transition: .25s; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, #eef3fb 0%, #ffffff 100%); }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(680px 420px at 82% 8%, rgba(22,211,198,.18), transparent 60%),
    radial-gradient(620px 460px at 10% 90%, rgba(27,110,243,.16), transparent 60%),
    linear-gradient(180deg, #eef3fb, #fff);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(11,31,58,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(11,31,58,.05) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(circle at 70% 30%, #000, transparent 75%);
}
.hero__inner {
  position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px;
  align-items: center; padding: 88px 0 96px;
}
.eyebrow {
  display: inline-block; font-family: var(--en); font-size: .78rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--blue); font-weight: 600; margin-bottom: 18px;
}
.hero h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(2.1rem, 4.4vw, 3.4rem); line-height: 1.18; color: var(--ink); letter-spacing: .01em; }
.grad { background: linear-gradient(120deg, var(--blue), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__lead { margin: 22px 0 30px; font-size: 1.08rem; color: var(--muted); max-width: 540px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__trust { margin-top: 26px; color: var(--muted); font-size: .9rem; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.hero__trust span:not(:nth-child(2)) { color: var(--ink); font-weight: 600; }

/* Hero 面板 */
.hero__panel { display: grid; place-items: center; }
.panel-card {
  width: 100%; max-width: 360px; background: rgba(255,255,255,.92);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow); backdrop-filter: blur(6px);
}
.panel-card__row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: .92rem; }
.panel-card__row span { color: var(--muted); }
.panel-card__row strong { color: var(--ink); font-family: var(--en); }
.panel-card__chart { display: flex; align-items: flex-end; gap: 10px; height: 120px; margin: 22px 0 16px; }
.panel-card__chart .bar { flex: 1; height: var(--h); border-radius: 6px 6px 3px 3px; background: linear-gradient(180deg, var(--cyan), var(--blue)); opacity: .9; }
.panel-card__foot { font-size: .82rem; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #25c26e; box-shadow: 0 0 0 4px rgba(37,194,110,.18); }

/* ---------- 通用 section ---------- */
.section { padding: 92px 0; }
.section__tag { display: inline-block; font-family: var(--en); font-size: .76rem; letter-spacing: .18em; text-transform: uppercase; color: var(--blue); font-weight: 600; margin-bottom: 14px; }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section__head h2, .about__intro h2, .contact__info h2 {
  font-family: var(--serif); font-weight: 700; font-size: clamp(1.7rem, 3vw, 2.5rem); color: var(--ink); line-height: 1.3;
}
.section__head p { color: var(--muted); margin-top: 14px; font-size: 1.02rem; }

/* ---------- About ---------- */
.about { background: var(--paper); }
.about__grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px; align-items: start; }
.about__intro p { color: var(--muted); margin: 16px 0; }
.about__intro strong { color: var(--ink); }
.about__list { list-style: none; margin-top: 24px; display: grid; gap: 12px; }
.about__list li { display: flex; gap: 10px; align-items: flex-start; font-weight: 500; }
.about__list span { color: var(--blue); }
.about__cards { display: grid; gap: 18px; }
.info-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); border-left: 4px solid var(--cyan); }
.info-card h3 { font-family: var(--serif); color: var(--ink); font-size: 1.15rem; margin-bottom: 8px; }
.info-card p { color: var(--muted); font-size: .96rem; }

/* ---------- Services ---------- */
.services__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.service-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 36px;
  box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease;
  position: relative; overflow: hidden;
}
.service-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: linear-gradient(90deg, var(--blue), var(--cyan)); opacity: 0; transition: opacity .25s; }
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.service-card:hover::before { opacity: 1; }
.service-card__icon { width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center; font-size: 1.6rem; background: linear-gradient(135deg, rgba(27,110,243,.12), rgba(22,211,198,.14)); margin-bottom: 18px; }
.service-card h3 { font-family: var(--serif); font-size: 1.4rem; color: var(--ink); }
.service-card h3 i { font-style: normal; font-family: var(--en); font-size: .72rem; letter-spacing: .1em; color: var(--muted); display: block; text-transform: uppercase; margin-top: 2px; }
.service-card p { color: var(--muted); margin: 12px 0 18px; }
.service-card ul { list-style: none; display: grid; gap: 10px; margin-bottom: 20px; }
.service-card li { position: relative; padding-left: 22px; color: var(--text); font-size: .96rem; }
.service-card li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue); font-weight: 700; }
.link-more { color: var(--blue); font-weight: 600; }
.link-more:hover { color: var(--cyan); }

/* 流程 */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 48px; }
.flow__step { background: var(--navy); color: #fff; border-radius: var(--radius); padding: 26px 22px; position: relative; }
.flow__step span { font-family: var(--en); font-size: 1.4rem; font-weight: 700; color: var(--cyan); }
.flow__step h4 { font-family: var(--serif); font-size: 1.12rem; margin: 8px 0 6px; }
.flow__step p { color: #b9c6dc; font-size: .9rem; }

/* ---------- Why ---------- */
.why { background: var(--paper); }
.why__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why__item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; box-shadow: var(--shadow-sm); }
.why__num { font-family: var(--en); font-weight: 700; font-size: 1.5rem; color: var(--cyan); margin-bottom: 12px; }
.why__item h3 { font-family: var(--serif); color: var(--ink); font-size: 1.12rem; margin-bottom: 8px; }
.why__item p { color: var(--muted); font-size: .92rem; }

/* ---------- Stats ---------- */
.stats { background: linear-gradient(135deg, var(--navy), var(--ink-2)); color: #fff; }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat strong { display: block; font-family: var(--en); font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 700; background: linear-gradient(120deg, #fff, var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: #b9c6dc; font-size: .95rem; letter-spacing: .02em; }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact__info p { color: var(--muted); margin: 14px 0 24px; }
.contact__list { list-style: none; display: grid; gap: 16px; }
.contact__list li { display: flex; gap: 12px; align-items: flex-start; font-size: 1rem; }
.contact__list span { font-size: 1.1rem; }
.contact__form { background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 34px; box-shadow: var(--shadow); }
.field { margin-bottom: 18px; display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: .9rem; font-weight: 500; color: var(--ink); }
.field input, .field select, .field textarea {
  font-family: var(--sans); font-size: .96rem; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: 10px; background: #fbfcfe; color: var(--text); transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(27,110,243,.14); }
.field textarea { resize: vertical; }
.form__hint { margin-top: 12px; font-size: .9rem; min-height: 1.2em; }
.form__hint.ok { color: #1f9d57; }
.form__hint.err { color: #d6453d; }

/* ---------- Footer ---------- */
.footer { background: var(--navy); color: #cdd9ec; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; padding: 60px 0 40px; }
.footer__brand p { margin-top: 16px; font-size: .9rem; color: #9fb3d1; line-height: 1.7; }
.footer__col h4 { color: #fff; font-family: var(--serif); font-size: 1.05rem; margin-bottom: 16px; font-weight: 600; }
.footer__col a, .footer__col span { display: block; color: #9fb3d1; font-size: .92rem; margin-bottom: 10px; transition: color .2s; }
.footer__col a:hover { color: var(--cyan); }
.footer__bar { border-top: 1px solid rgba(255,255,255,.08); }
.footer__bar-inner { display: flex; justify-content: space-between; gap: 16px; padding: 18px 0; font-size: .82rem; color: #8298bb; flex-wrap: wrap; }

/* ---------- 揭示動畫 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 響應式 ---------- */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; padding: 64px 0 72px; }
  .hero__panel { display: none; }
  .about__grid { grid-template-columns: 1fr; gap: 36px; }
  .services__grid { grid-template-columns: 1fr; }
  .flow, .why__grid, .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; gap: 36px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .topbar__right { display: none; }
  .nav__links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 12px 6vw 22px;
    transform: translateY(-120%); transition: transform .3s ease; box-shadow: var(--shadow);
  }
  .nav__links.open { transform: translateY(0); }
  .nav__links a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav__links a i { display: inline; margin-left: 6px; }
  .nav__cta { margin-top: 14px; text-align: center; }
  .nav__toggle { display: flex; }
  .nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle.open span:nth-child(2) { opacity: 0; }
  .nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .flow, .why__grid, .stats__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}