/* ============================================================
   HY Fiberglass — Sculpture export website
   Design replica of the HF Fiberglass catalogue site
   ============================================================ */

:root {
  --cream: #faefe0;
  --cream-soft: #f5e7d2;
  --ink: #282a29;
  --ink-soft: #4a4d4b;
  --black: #171810;
  --line: rgba(40, 42, 41, 0.18);
  --line-light: rgba(250, 239, 224, 0.22);
  --font-display: 'Open Sauce', 'Arial', sans-serif;
  --font-serif: 'Futura', 'Arial', sans-serif;
  --font-body: 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-sans: 'DM Sans', 'Arial', sans-serif;
  --font-heading: 'ZCOOL XiaoWei', 'Source Han Serif SC', serif;
  --font-script: 'Brittany', cursive;
  --maxw: 1280px;
  --nav-h: 74px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 48px; }

.band { padding: 96px 0; position: relative; }
.band.dark { background: var(--ink); color: var(--cream); }
.band.cream { background: var(--cream); color: var(--ink); }

/* ---------- Typography helpers ---------- */
.kicker {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  font-size: 13px;
}

.title-cn {
  font-family: var(--font-heading);
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: 1.12;
  font-weight: 400;
}

.title-en {
  font-family: var(--font-display);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.04;
}

.lead { font-size: 19px; line-height: 1.75; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 14px;
  padding: 15px 30px;
  transition: background 0.25s, color 0.25s, transform 0.25s;
  cursor: pointer;
}
.btn:hover { background: var(--ink); color: var(--cream); transform: translateY(-2px); }
.btn.light { border-color: var(--cream); color: var(--cream); }
.btn.light:hover { background: var(--cream); color: var(--ink); }

.section-head { margin-bottom: 54px; }
.section-head .kicker { margin-bottom: 14px; }
.section-head p { margin-top: 18px; max-width: 720px; }
.section-head.center { text-align: center; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* ---------- Top navigation ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s, box-shadow 0.3s;
  background: rgba(250, 239, 224, 0.86);
  backdrop-filter: blur(10px);
}
.nav.scrolled { box-shadow: 0 1px 0 var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-display);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 21px;
}
.brand img { width: 46px; height: 46px; object-fit: contain; }
.brand small { display: block; font-family: var(--font-sans); font-weight: 400; letter-spacing: 0.28em; font-size: 9px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 26px; font-family: var(--font-sans); font-size: 15px; font-weight: 500; }
.nav-links > a { opacity: 0.85; transition: opacity 0.2s; }
.nav-links > a:hover { opacity: 1; }

.dropdown { position: relative; }
.dropdown > button {
  background: none; border: 0; font: inherit; color: inherit; cursor: pointer;
  display: flex; align-items: center; gap: 6px; opacity: 0.85; padding: 8px 0;
}
.dropdown > button:hover { opacity: 1; }
.dropdown-menu {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  background: var(--ink); color: var(--cream);
  min-width: 250px; padding: 12px 0; opacity: 0; visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  box-shadow: 0 20px 40px rgba(23, 24, 16, 0.25);
}
.dropdown:hover .dropdown-menu, .dropdown:focus-within .dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-menu a { display: block; padding: 10px 22px; font-size: 14px; opacity: 0.85; }
.dropdown-menu a:hover { opacity: 1; background: rgba(250, 239, 224, 0.08); }

.nav-cta {
  background: var(--ink); color: var(--cream);
  font-family: var(--font-sans); font-weight: 700; font-size: 13px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 12px 22px; transition: background 0.25s, color 0.25s;
}
.nav-cta:hover { background: var(--black); color: var(--cream); }

.burger { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; z-index: 120; }
.burger span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px auto; transition: 0.25s; }
body.menu-open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.menu-open .burger span:nth-child(2) { opacity: 0; }
body.menu-open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 110; background: var(--cream);
  display: flex; flex-direction: column; justify-content: center; gap: 8px;
  padding: 80px 40px; opacity: 0; visibility: hidden; transition: 0.3s;
}
body.menu-open .mobile-menu { opacity: 1; visibility: visible; }
.mobile-menu a { font-family: var(--font-display); font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; font-size: 28px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.mobile-menu .m-sub { font-size: 17px; opacity: 0.7; padding-left: 18px; }
.mobile-menu .m-cta { margin-top: 24px; justify-content: center; }

/* ---------- Left vertical rail ---------- */
.rail {
  position: fixed; left: 0; top: 50%; transform: translateY(-50%);
  z-index: 90; display: none; flex-direction: column; align-items: center; gap: 30px;
  padding: 10px 0;
}
.rail a {
  font-family: var(--font-heading);
  font-size: 15px; font-weight: 700;
  writing-mode: vertical-rl;
  letter-spacing: 0.2em;
  opacity: 0.62; transition: opacity 0.2s;
}
.rail a:hover, .rail a.active { opacity: 1; }
.rail .rail-logo { font-family: var(--font-serif); font-weight: 700; font-size: 24px; opacity: 0.85; }
@media (min-width: 1240px) { .rail { display: flex; } .wrap { padding-left: 88px; padding-right: 48px; } }

/* ---------- Hero ---------- */
.hero { min-height: 100vh; display: flex; align-items: center; padding: calc(var(--nav-h) + 40px) 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.hero h1 { font-size: clamp(64px, 9vw, 118px); letter-spacing: 0.04em; }
.hero .hero-sub {
  font-family: var(--font-serif); font-weight: 800; text-transform: uppercase;
  font-size: clamp(20px, 2.4vw, 30px); letter-spacing: 0.06em; margin: 26px 0 18px;
}
.hero p { max-width: 460px; }
.hero .btn { margin-top: 34px; }
.hero-visual { position: relative; }
.hero-visual .frame { overflow: hidden; border-radius: 4px; }
.hero-visual img { width: 100%; height: 620px; object-fit: cover; transition: transform 1.2s; }
.hero-visual:hover img { transform: scale(1.04); }
.hero-flag {
  position: absolute; right: -18px; bottom: 34px;
  background: var(--ink); color: var(--cream);
  font-family: var(--font-serif); font-weight: 700; font-size: 15px;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 14px 20px; writing-mode: vertical-rl;
}

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 70px; align-items: center; }
.about-media img { width: 100%; height: 720px; object-fit: cover; border-radius: 4px; }
.about-copy p { margin: 18px 0; }
.about-copy .btn { margin-top: 14px; }

/* ---------- Services ---------- */
.services-intro { display: grid; grid-template-columns: 1fr 1.25fr; gap: 60px; align-items: end; margin-bottom: 64px; }
.services-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px; }
.service-card { background: rgba(250, 239, 224, 0.05); border: 1px solid var(--line-light); padding: 38px 30px; transition: background 0.3s, transform 0.3s; }
.service-card:hover { background: rgba(250, 239, 224, 0.09); transform: translateY(-5px); }
.service-card .icon { width: 92px; height: 92px; object-fit: cover; border-radius: 50%; margin-bottom: 22px; }
.service-card h3 { font-family: var(--font-serif); font-weight: 600; font-size: 22px; letter-spacing: 0.04em; margin-bottom: 12px; }
.service-card p { font-size: 15px; opacity: 0.88; }

/* ---------- Hot sale collection ---------- */
.hot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.hot-card {
  border: 1px solid var(--line); padding: 34px 26px 28px;
  display: flex; flex-direction: column; gap: 18px;
  background: rgba(255, 255, 255, 0.25);
  transition: background 0.3s, transform 0.3s, border-color 0.3s;
}
.hot-card:hover { background: var(--ink); border-color: var(--ink); color: var(--cream); transform: translateY(-5px); }
.hot-card .hc-num { font-family: var(--font-serif); font-weight: 700; font-size: 13px; letter-spacing: 0.2em; opacity: 0.55; }
.hot-card h3 { font-family: var(--font-sans); font-weight: 700; font-size: 19px; line-height: 1.3; }
.hot-card .view { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.8; }
.hot-card .view svg { width: 14px; height: 14px; transition: transform 0.3s; }
.hot-card:hover .view svg { transform: translateX(5px); }

/* ---------- Feature (create / customize) ---------- */
.feature { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 70px; align-items: center; }
.feature.flip { grid-template-columns: 0.95fr 1.05fr; }
.feature-media { position: relative; }
.feature-media img { width: 100%; height: 700px; object-fit: cover; border-radius: 4px; }
.feature-copy .kicker { margin-bottom: 16px; }
.feature-copy p { margin-top: 22px; max-width: 520px; }
.feature-copy .btn { margin-top: 30px; }

/* ---------- Steps (order process) ---------- */
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 70px; counter-reset: step; }
.step { border-top: 2px solid var(--ink); padding-top: 22px; display: flex; gap: 26px; }
.step .num { font-family: var(--font-display); font-weight: 800; font-size: 42px; line-height: 1; opacity: 0.22; min-width: 74px; }
.step h3 { font-family: var(--font-serif); font-weight: 600; font-size: 20px; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px; }
.step p { font-size: 15.5px; opacity: 0.9; }

/* ---------- Testimonials ---------- */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.review { background: rgba(255, 255, 255, 0.32); border: 1px solid var(--line); padding: 36px 30px; display: flex; flex-direction: column; gap: 16px; }
.review .stars { display: flex; gap: 4px; }
.review .stars svg { width: 18px; height: 18px; fill: var(--ink); }
.review blockquote { font-family: var(--font-sans); font-size: 16px; line-height: 1.7; font-weight: 500; }
.review cite { font-style: normal; font-family: var(--font-sans); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; font-size: 14px; margin-top: auto; }

/* ---------- About detail (learn more) ---------- */
.about-cover img { width: 100%; height: 640px; object-fit: cover; }
.about-block { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.about-block .txt p { margin-top: 18px; }
.about-block .txt .title-cn { margin-bottom: 18px; }
.about-block img { width: 100%; height: 520px; object-fit: cover; border-radius: 4px; }
.mission-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 70px; }
.mission { border-top: 2px solid var(--ink); padding-top: 26px; }
.mission .m-num { font-family: var(--font-display); font-weight: 800; font-size: 40px; opacity: 0.25; }
.mission h3 { font-family: var(--font-serif); font-weight: 600; font-size: 22px; letter-spacing: 0.04em; margin: 8px 0 12px; }
.mission p { font-size: 16px; }

/* ---------- Category sections ---------- */
.cat-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 46px; }
.cat-note { font-family: var(--font-serif); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.65; text-align: right; max-width: 320px; }
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 46px 26px; }
.product-card { cursor: pointer; }
.product-media { position: relative; overflow: hidden; aspect-ratio: 466 / 436; background: var(--cream-soft); }
.product-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity 0.7s, transform 0.8s; }
.product-media img.alt { opacity: 0; }
.product-card:hover .product-media img.main { transform: scale(1.05); }
.product-card:hover .product-media img.alt { opacity: 1; }
.product-card h3 { font-family: var(--font-body); font-weight: 700; font-size: 15.5px; line-height: 1.55; margin-top: 18px; letter-spacing: 0.01em; }
.product-card .p-code { font-family: var(--font-serif); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; opacity: 0.55; margin-top: 6px; }

.process-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px 70px; }
.process-item { display: grid; grid-template-columns: 110px 1fr; gap: 22px; align-items: center; }
.process-item .pimg { overflow: hidden; border-radius: 3px; }
.process-item .pimg img { width: 110px; height: 164px; object-fit: cover; }
.process-item h3 { font-family: var(--font-serif); font-weight: 700; font-size: 19px; letter-spacing: 0.06em; text-transform: uppercase; }

.fiberglass-band { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.fiberglass-band img { width: 100%; height: 520px; object-fit: cover; border-radius: 4px; }
.fiberglass-band p { margin-top: 20px; font-size: 16.5px; }

.cat-bigimg { padding: 0; }
.cat-bigimg img { width: 100%; height: 520px; object-fit: cover; }

/* ---------- Customize ---------- */
.customize-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 44px 70px; }
.cstep { display: flex; gap: 22px; }
.cstep img { width: 86px; height: 96px; object-fit: contain; }
.cstep h3 { font-family: var(--font-serif); font-weight: 600; font-size: 20px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }
.cstep p { font-size: 15.5px; opacity: 0.9; }

.drawing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.drawing-grid img { width: 100%; height: 520px; object-fit: cover; border-radius: 4px; }

.provide-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 70px; align-items: center; }
.provide-grid img { width: 100%; height: 720px; object-fit: cover; border-radius: 4px; }
.provide-list { margin-top: 26px; }
.provide-list li { padding: 14px 0 14px 34px; border-bottom: 1px solid var(--line); position: relative; font-size: 16.5px; }
.provide-list li::before { content: ''; position: absolute; left: 4px; top: 22px; width: 10px; height: 10px; border: 2px solid var(--ink); transform: rotate(45deg); }

/* ---------- Buying guide ---------- */
.guide-intro { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 70px; align-items: center; }
.guide-intro img { width: 100%; height: 640px; object-fit: cover; border-radius: 4px; }
.guide-options { margin-top: 40px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.gopt { display: flex; align-items: center; gap: 18px; border: 1px solid var(--line); padding: 22px 24px; }
.gopt img { width: 56px; height: 56px; object-fit: contain; }
.gopt h3 { font-family: var(--font-heading); font-size: 22px; }

.guide-row { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.guide-row img { width: 100%; height: 560px; object-fit: cover; border-radius: 4px; }
.guide-row p { margin-top: 18px; font-size: 16px; }
.guide-title { font-family: var(--font-serif); font-weight: 700; font-size: 26px; letter-spacing: 0.04em; }

.illum-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.illum-grid img { width: 100%; height: 320px; object-fit: cover; border-radius: 4px; }

/* ---------- Contact / footer ---------- */
.contact-band { color: var(--cream); }
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 70px; }
.contact-media { position: relative; }
.contact-media img { width: 100%; height: 780px; object-fit: cover; border-radius: 4px; }
.contact-media .logo-script {
  position: absolute; left: 28px; bottom: 30px;
  font-family: var(--font-script); font-size: clamp(44px, 5vw, 68px);
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
}
.contact-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 46px 50px; }
.contact-col h4 { font-family: var(--font-heading); font-size: 30px; margin-bottom: 20px; }
.contact-col ul li { padding: 9px 0; font-size: 16px; opacity: 0.92; }
.contact-col ul li a:hover { text-decoration: underline; }
.contact-col .c-title { font-family: var(--font-serif); font-weight: 600; font-size: 13px; letter-spacing: 0.2em; text-transform: uppercase; opacity: 0.6; margin-top: 14px; }
.socials { display: flex; gap: 12px; flex-wrap: wrap; }
.socials a {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line-light); padding: 10px 16px;
  font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.06em;
  text-transform: uppercase; transition: background 0.25s;
}
.socials a:hover { background: rgba(250, 239, 224, 0.12); }
.contact-bottom { margin-top: 70px; border-top: 1px solid var(--line-light); padding-top: 30px; display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; font-size: 14px; opacity: 0.85; }

.whatsapp-float {
  position: fixed; right: 26px; bottom: 26px; z-index: 95;
  width: 58px; height: 58px; border-radius: 50%;
  background: #25d366; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25); transition: transform 0.25s;
}
.whatsapp-float:hover { transform: translateY(-4px) scale(1.05); }
.whatsapp-float svg { width: 30px; height: 30px; fill: #fff; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .wrap { padding: 0 28px; }
  .hero-grid, .about-grid, .feature, .feature.flip, .about-block, .fiberglass-band,
  .guide-intro, .guide-row, .provide-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual img, .about-media img, .feature-media img, .about-block img,
  .fiberglass-band img, .guide-intro img, .guide-row img, .provide-grid img,
  .contact-media img { height: auto; max-height: 520px; }
  .services-intro { grid-template-columns: 1fr; }
  .products, .hot-grid, .reviews, .drawing-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cols { grid-template-columns: 1fr; }
  .nav-links, .nav-cta { display: none; }
  .burger { display: block; }
}
@media (max-width: 640px) {
  .band { padding: 64px 0; }
  .products, .hot-grid, .reviews, .steps, .process-grid, .customize-steps,
  .guide-options, .illum-grid, .mission-grid, .drawing-grid, .services-list { grid-template-columns: 1fr; }
  .hero h1 { font-size: 38px; letter-spacing: 0.02em; }
  .hero .hero-sub { font-size: 18px; }
  .hero .hero-flag { position: static; writing-mode: horizontal-tb; margin-top: 18px; }
  .hero-visual img { height: 420px; }
  .hero { padding-top: calc(var(--nav-h) + 24px); }
  .cat-head { flex-direction: column; align-items: flex-start; }
  .cat-note { text-align: left; }
}

/* ---------- Print / accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}