/*
Theme Name: QuickSurf Brand
Theme URI: https://quicksurf.subc.com
Author: SUBC
Description: Official QuickSurf brand site based on 2023 VI manual.
Version: 1.1.0
Text Domain: quicksurf-brand
*/

:root {
  --qs-primary: #2c4d9f;
  --qs-primary-dark: #406bb3;
  --qs-accent: #63c6ed;
  --qs-ink: #0f1b33;
  --qs-muted: #5b6475;
  --qs-bg: #f4f8fc;
  --qs-white: #ffffff;
  --qs-lime: #b8e986;
  --qs-yellow: #f5d547;
  --qs-radius: 18px;
  --qs-shadow: 0 18px 50px rgba(44, 77, 159, 0.12);
  --qs-max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--qs-ink);
  background: var(--qs-bg);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.qs-shell { min-height: 100vh; display: flex; flex-direction: column; }
.qs-container { width: min(var(--qs-max), calc(100% - 40px)); margin: 0 auto; }

.qs-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid rgba(44,77,159,.08);
}
.qs-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 14px 0;
}
.qs-brand { display: flex; align-items: center; gap: 14px; }
.qs-brand img { width: 52px; height: auto; }
.qs-brand-text strong {
  display: block; font-size: 1.15rem; letter-spacing: .04em; color: var(--qs-primary);
}
.qs-brand-text span { font-size: .82rem; color: var(--qs-muted); }

.qs-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.qs-nav a {
  font-size: .95rem; color: var(--qs-muted); transition: color .2s ease;
}
.qs-nav a:hover { color: var(--qs-primary); }

.qs-header-actions { display: flex; align-items: center; gap: 12px; }
.qs-lang {
  display: inline-flex; padding: 3px; border-radius: 999px;
  background: rgba(44,77,159,.08); border: 1px solid rgba(44,77,159,.12);
}
.qs-lang button {
  border: 0; background: transparent; color: var(--qs-muted);
  font: inherit; font-size: .82rem; font-weight: 600;
  padding: 7px 12px; border-radius: 999px; cursor: pointer;
}
.qs-lang button.is-active {
  background: var(--qs-white); color: var(--qs-primary);
  box-shadow: 0 4px 14px rgba(44,77,159,.15);
}

.qs-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px; font-weight: 600;
  transition: transform .2s ease, box-shadow .2s ease;
}
.qs-btn-primary {
  background: linear-gradient(135deg, var(--qs-primary), var(--qs-primary-dark));
  color: #fff; box-shadow: 0 10px 24px rgba(44,77,159,.25);
}
.qs-btn-primary:hover { transform: translateY(-1px); }
.qs-btn-outline {
  border: 1px solid rgba(44,77,159,.25); color: var(--qs-primary); background: #fff;
}

.qs-hero {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(120deg, #17356f 0%, var(--qs-primary) 45%, var(--qs-accent) 100%);
}
.qs-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(99,198,237,.35), transparent 30%);
}
.qs-hero-grid {
  position: relative; display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 36px; align-items: center; padding: 72px 0 56px;
}
.qs-eyebrow {
  display: inline-block; padding: 6px 12px; border-radius: 999px;
  background: rgba(255,255,255,.14); font-size: .82rem; letter-spacing: .12em;
  text-transform: uppercase;
}
.qs-hero h1 {
  margin: 18px 0 12px; font-size: clamp(2.4rem, 5vw, 4.4rem); line-height: 1.05;
  letter-spacing: .02em;
}
.qs-hero h1 em {
  font-style: normal; color: var(--qs-yellow);
  text-shadow: 0 8px 30px rgba(0,0,0,.18);
}
.qs-hero-lead { max-width: 34rem; font-size: 1.05rem; opacity: .95; }
.qs-hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.qs-hero-card {
  border-radius: calc(var(--qs-radius) + 6px);
  overflow: hidden; box-shadow: var(--qs-shadow);
  border: 1px solid rgba(255,255,255,.25);
}
.qs-hero-card img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }

.qs-section { padding: 72px 0; }
.qs-section-title { text-align: center; margin-bottom: 42px; }
.qs-section-title h2 {
  margin: 0 0 10px; font-size: clamp(1.8rem, 3vw, 2.5rem); color: var(--qs-primary);
}
.qs-section-title p { margin: 0; color: var(--qs-muted); }

.qs-grid-3 {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px;
}
.qs-card {
  background: var(--qs-white); border-radius: var(--qs-radius);
  padding: 26px; box-shadow: var(--qs-shadow);
  border: 1px solid rgba(44,77,159,.06);
}
.qs-card h3 { margin: 0 0 10px; color: var(--qs-primary); }
.qs-card p { margin: 0; color: var(--qs-muted); }

.qs-palette {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px;
}
.qs-swatch { border-radius: 16px; overflow: hidden; background: #fff; box-shadow: var(--qs-shadow); }
.qs-swatch-color { height: 96px; }
.qs-swatch-meta { padding: 14px 16px; font-size: .92rem; }
.qs-swatch-meta strong { display: block; color: var(--qs-primary); }

.qs-gallery {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px;
}
.qs-gallery figure {
  margin: 0; border-radius: var(--qs-radius); overflow: hidden; box-shadow: var(--qs-shadow);
}
.qs-gallery figcaption {
  padding: 12px 14px; font-size: .88rem; color: var(--qs-muted); background: #fff;
}

.qs-quote {
  background: linear-gradient(135deg, rgba(44,77,159,.08), rgba(99,198,237,.16));
  border-radius: calc(var(--qs-radius) + 4px);
  padding: 34px; text-align: center;
}
.qs-quote blockquote {
  margin: 0; font-size: clamp(1.6rem, 3vw, 2.3rem); color: var(--qs-primary); font-weight: 700;
}
.qs-quote p { margin: 12px 0 0; color: var(--qs-muted); }

.qs-contact {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: stretch;
}
.qs-contact-box {
  background: var(--qs-white); border-radius: var(--qs-radius); padding: 28px; box-shadow: var(--qs-shadow);
}
.qs-contact-box ul { margin: 0; padding-left: 18px; color: var(--qs-muted); }

.qs-footer {
  margin-top: auto; background: #10213f; color: rgba(255,255,255,.82); padding: 28px 0;
}
.qs-footer-inner {
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center;
}
.qs-footer small { opacity: .75; }

@media (max-width: 960px) {
  .qs-hero-grid, .qs-gallery, .qs-contact, .qs-grid-3, .qs-palette { grid-template-columns: 1fr; }
  .qs-nav { display: none; }
  .qs-header-inner { flex-wrap: wrap; }
  .qs-header-actions { width: 100%; justify-content: flex-end; }
}