/* ==========================================================================
   SUNRISING (VIETNAM) CO., LTD — Corporate Demo Site
   Design language: Industrial Refined / "Deep Sea & Sunrise"
   Palette derived from brand logo: navy wave + golden sun
   ========================================================================== */

:root {
  /* Color system */
  --navy-950: #050C18;
  --navy-900: #0A1628;
  --navy-850: #0D1D33;
  --navy-800: #122541;
  --navy-700: #1A3457;
  --steel-600: #24466E;
  --steel-400: #4F7699;
  --steel-300: #7FA3C4;
  --mist-200: #D9E4EF;
  --mist-100: #EDF2F8;
  --gold-600: #D99A16;
  --gold-500: #F5B32A;
  --gold-400: #FFC53D;
  --white: #F8FAFD;
  --ink: #101E30;

  /* Typography — 整站统一 Times New Roman（Tinos 为其度量兼容 webfont 兜底） */
  --font-display: 'Times New Roman', 'Tinos', 'Liberation Serif', Times, Georgia, serif;
  --font-body: 'Times New Roman', 'Tinos', 'Liberation Serif', Times, Georgia, serif;
  --font-mono: 'Times New Roman', 'Tinos', 'Liberation Serif', Times, Georgia, serif;

  /* Layout */
  --container: 1200px;
  --gutter: clamp(20px, 4vw, 48px);
  --section-pad: clamp(72px, 9vw, 128px);
  --radius: 14px;

  --shadow-card: 0 24px 48px -24px rgba(3, 10, 22, 0.55);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--mist-100);
  background: var(--navy-900);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

::selection { background: var(--gold-500); color: var(--navy-950); }

/* ---------- Typography helpers ---------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-400);
}
.kicker::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--gold-500);
}

.section-title {
  font-size: clamp(32px, 4.4vw, 50px);
  margin: 18px 0 20px;
  color: var(--white);
}
.section-title em {
  font-style: normal;
  color: var(--gold-500);
}

.section-lead {
  max-width: 640px;
  color: var(--steel-300);
  font-size: 17px;
}

/* ---------- Layout ---------- */
.container {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.section { padding-block: var(--section-pad); position: relative; }

/* Section index label, engineering-drawing style */
.section-tag {
  position: absolute;
  top: 34px;
  right: var(--gutter);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(127, 163, 196, 0.5);
  writing-mode: vertical-rl;
  user-select: none;
}

/* Fine blueprint grid backdrop */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127, 163, 196, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 163, 196, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

/* Sun-arc motif (echoes the logo) */
.sun-arc {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(245, 179, 42, 0.28);
  pointer-events: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 15px 30px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: 4px;
  transition: transform 0.35s var(--ease-out), background 0.35s, color 0.35s, box-shadow 0.35s;
}
.btn svg { transition: transform 0.35s var(--ease-out); }
.btn:hover svg { transform: translateX(4px); }

.btn--gold {
  background: var(--gold-500);
  color: var(--navy-950);
  box-shadow: 0 12px 32px -12px rgba(245, 179, 42, 0.55);
}
.btn--gold:hover { background: var(--gold-400); transform: translateY(-2px); }

.btn--ghost {
  color: var(--white);
  border: 1px solid rgba(217, 228, 239, 0.35);
}
.btn--ghost:hover { border-color: var(--gold-500); color: var(--gold-400); transform: translateY(-2px); }

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.4s, box-shadow 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(6, 13, 24, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: rgba(127, 163, 196, 0.14);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav__brand img {
  height: 44px; width: auto;
  /* 原始 PNG 为黑底，screen 混合使黑底融入深色导航，仅保留太阳与海浪图形 */
  mix-blend-mode: screen;
  filter: brightness(1.15) saturate(1.1);
}
.nav__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.nav__brand-text b {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--white);
  text-transform: uppercase;
}
.nav__brand-text span {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.3em;
  color: var(--gold-400);
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 36px);
}
.nav__links a {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist-200);
  padding: 6px 0;
  transition: color 0.3s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-out);
}
.nav__links a:hover { color: var(--gold-400); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav__cta { margin-left: 10px; }
.nav .btn { padding: 11px 22px; font-size: 12px; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav__burger span {
  width: 24px; height: 2px;
  background: var(--white);
  transition: transform 0.35s var(--ease-out), opacity 0.3s;
}
.nav.is-open .nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  isolation: isolate;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  animation: heroDrift 22s var(--ease-out) forwards;
}
@keyframes heroDrift { to { transform: scale(1); } }

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 12, 24, 0.62) 0%, rgba(5, 12, 24, 0.28) 42%, rgba(5, 12, 24, 0.92) 100%),
    radial-gradient(120% 90% at 78% 108%, rgba(245, 179, 42, 0.32) 0%, transparent 55%);
}

.hero__sun {
  position: absolute;
  z-index: -1;
  right: -140px;
  bottom: -320px;
  width: 640px; height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 42%, rgba(255, 197, 61, 0.5), rgba(245, 179, 42, 0.12) 46%, transparent 68%);
  filter: blur(2px);
}

.hero__inner {
  position: relative;
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding-block: 160px 0;
}

.hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold-400);
  padding: 10px 18px;
  border: 1px solid rgba(245, 179, 42, 0.4);
  border-radius: 999px;
  background: rgba(245, 179, 42, 0.08);
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: clamp(44px, 6.6vw, 92px);
  color: var(--white);
  margin: 26px 0 10px;
  text-wrap: balance;
}
.hero h1 .line { display: block; }
.hero h1 .accent {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--gold-500);
}

.hero__sub {
  max-width: 620px;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--mist-200);
  margin-bottom: 12px;
}
.hero__tagline {
  max-width: 620px;
  font-size: 15px;
  color: var(--steel-300);
  margin-bottom: 38px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: clamp(48px, 7vh, 84px);
}

/* Hero bottom stat strip */
.hero__stats {
  position: relative;
  border-top: 1px solid rgba(217, 228, 239, 0.16);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 26px 26px 30px 0;
  border-right: 1px solid rgba(217, 228, 239, 0.12);
}
.stat:last-child { border-right: none; }
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.6vw, 46px);
  font-weight: 700;
  color: var(--gold-500);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.stat__num small {
  font-size: 0.5em;
  font-family: var(--font-mono);
  color: var(--mist-200);
  letter-spacing: 0.08em;
}
.stat__label {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-300);
}

/* Load-in animation */
.reveal-load {
  opacity: 0;
  transform: translateY(28px);
  animation: rise 0.9s var(--ease-out) forwards;
}
@keyframes rise { to { opacity: 1; transform: none; } }
.d1 { animation-delay: 0.10s; } .d2 { animation-delay: 0.22s; }
.d3 { animation-delay: 0.34s; } .d4 { animation-delay: 0.46s; }
.d5 { animation-delay: 0.58s; } .d6 { animation-delay: 0.72s; }

/* ==========================================================================
   MARQUEE (certification / value strip)
   ========================================================================== */
.strip {
  border-block: 1px solid rgba(127, 163, 196, 0.16);
  background: var(--navy-950);
  overflow: hidden;
  padding: 18px 0;
}
.strip__track {
  display: flex;
  gap: 64px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.strip:hover .strip__track { animation-play-state: paused; }
.strip__item {
  display: flex;
  align-items: center;
  gap: 64px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--steel-300);
  white-space: nowrap;
}
.strip__item i {
  width: 7px; height: 7px;
  background: var(--gold-500);
  border-radius: 50%;
  font-style: normal;
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about { background: var(--navy-900); overflow: hidden; }

.about__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}

.about__copy p {
  color: var(--steel-300);
  margin-bottom: 18px;
  font-size: 15.5px;
}
.about__copy p strong { color: var(--mist-100); font-weight: 600; }

.about__list {
  margin-top: 26px;
  display: grid;
  gap: 14px;
}
.about__list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  color: var(--mist-200);
  font-size: 15px;
}
.about__list svg {
  flex: none;
  margin-top: 3px;
  width: 20px; height: 20px;
  padding: 4px;
  background: rgba(245, 179, 42, 0.14);
  border-radius: 50%;
  stroke: var(--gold-400);
}

/* Image composition with engineering corner marks */
.about__visual { position: relative; }
.about__img-main {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(127, 163, 196, 0.2);
}
.about__img-main img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.about__img-sub {
  position: absolute;
  bottom: -48px;
  left: -40px;
  width: 46%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 6px solid var(--navy-900);
  box-shadow: var(--shadow-card);
}
.about__img-sub img { aspect-ratio: 1; object-fit: cover; width: 100%; }

.corner {
  position: absolute;
  width: 26px; height: 26px;
  border: 2px solid var(--gold-500);
}
.corner--tl { top: -14px; left: -14px; border-right: none; border-bottom: none; }
.corner--br { bottom: -14px; right: -14px; border-left: none; border-top: none; }

.about__badge {
  position: absolute;
  top: -26px;
  right: -12px;
  background: var(--gold-500);
  color: var(--navy-950);
  border-radius: 10px;
  padding: 16px 20px;
  text-align: center;
  box-shadow: 0 18px 36px -14px rgba(245, 179, 42, 0.5);
}
.about__badge b {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1;
}
.about__badge span {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ==========================================================================
   ADVANTAGES
   ========================================================================== */
.advantages {
  background: linear-gradient(180deg, var(--navy-850), var(--navy-900));
  overflow: hidden;
}

.adv__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: clamp(40px, 6vw, 72px);
}

.adv__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

.adv-card {
  position: relative;
  background: rgba(18, 37, 65, 0.5);
  border: 1px solid rgba(127, 163, 196, 0.18);
  border-radius: var(--radius);
  padding: 30px 28px;
  overflow: hidden;
  transition: transform 0.45s var(--ease-out), border-color 0.4s, background 0.4s;
}
.adv-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold-400), var(--gold-600));
  opacity: 0;
  transition: opacity 0.4s;
}
.adv-card:hover { transform: translateY(-6px); border-color: rgba(245, 179, 42, 0.45); background: rgba(18, 37, 65, 0.8); }
.adv-card:hover::before { opacity: 1; }

.adv-card__num {
  position: absolute;
  top: 18px; right: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(127, 163, 196, 0.55);
}

.adv-card__icon {
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(245, 179, 42, 0.16), rgba(245, 179, 42, 0.05));
  border: 1px solid rgba(245, 179, 42, 0.3);
  margin-bottom: 20px;
}
.adv-card__icon svg { width: 26px; height: 26px; stroke: var(--gold-400); }

.adv-card h3 {
  font-size: 24px;
  color: var(--white);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}
.adv-card p { color: var(--steel-300); font-size: 14.5px; }

.adv-card--map {
  grid-column: span 5;
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, rgba(18, 37, 65, 0.9), rgba(10, 22, 40, 0.9));
}
.adv-card--map .adv-card__map {
  flex: 1;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(127, 163, 196, 0.2);
  margin-bottom: 20px;
  min-height: 220px;
}
.adv-card--map img { width: 100%; height: 100%; object-fit: cover; object-position: center; }

.adv-card--quarter { grid-column: span 7; }
.adv-card--half { grid-column: span 6; }

/* Big facility metric card */
.adv-card--facility {
  grid-column: span 12;
  display: flex;
  align-items: center;
  gap: 32px;
  background: linear-gradient(140deg, rgba(245, 179, 42, 0.14), rgba(18, 37, 65, 0.65) 55%);
  border-color: rgba(245, 179, 42, 0.4);
}
.adv-card--facility img {
  width: 30%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 10px;
  flex: none;
}
.adv-card--facility .facility-num {
  font-family: var(--font-display);
  font-size: clamp(38px, 4vw, 54px);
  color: var(--gold-500);
  line-height: 1;
}
.adv-card--facility .facility-num small { font-size: 0.42em; color: var(--mist-200); }

/* ==========================================================================
   PRODUCTS
   ========================================================================== */
.products { background: var(--navy-950); }

.prod__head { margin-bottom: clamp(40px, 6vw, 64px); }

.prod__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.prod-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(127, 163, 196, 0.16);
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  isolation: isolate;
  transition: transform 0.45s var(--ease-out), border-color 0.4s;
}
.prod-card:hover { transform: translateY(-6px); border-color: rgba(245, 179, 42, 0.5); }

.prod-card__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.prod-card__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out), filter 0.5s;
  filter: saturate(0.86) brightness(0.92);
}
.prod-card:hover .prod-card__bg img { transform: scale(1.06); filter: saturate(1) brightness(1); }

.prod-card__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(185deg, rgba(5, 12, 24, 0.06) 30%, rgba(5, 12, 24, 0.88) 92%);
}

.prod-card__body { padding: 24px; width: 100%; }
.prod-card__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold-400);
  display: block;
  margin-bottom: 6px;
}
.prod-card h3 {
  font-size: 26px;
  color: var(--white);
  letter-spacing: 0.02em;
}

.prod-card--text {
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(245, 179, 42, 0.14), transparent 55%),
    rgba(18, 37, 65, 0.55);
  align-items: center;
  justify-content: center;
  text-align: center;
  border-style: dashed;
  border-color: rgba(245, 179, 42, 0.35);
}
.prod-card--text:hover { border-color: var(--gold-500); }
.prod-card--text .plus {
  font-family: var(--font-display);
  font-size: 64px;
  color: var(--gold-500);
  line-height: 1;
  margin-bottom: 10px;
}
.prod-card--text p {
  color: var(--mist-200);
  font-size: 15px;
  max-width: 240px;
}

.prod__foot {
  margin-top: clamp(36px, 5vw, 56px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(127, 163, 196, 0.16);
  padding-top: 32px;
}
.prod__foot p {
  max-width: 640px;
  color: var(--steel-300);
  font-size: 15.5px;
}
.prod__foot p em { color: var(--gold-400); font-style: normal; }

/* ==========================================================================
   PROCESS
   ========================================================================== */
.process { background: var(--navy-900); overflow: hidden; }

.proc__timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 44px 26px;
  margin-top: clamp(56px, 7vw, 80px);
}

.proc-step { position: relative; }
.proc-step__node {
  position: absolute;
  top: -20px;
  left: 18px;
  z-index: 2;
  width: 60px; height: 60px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--navy-800);
  border: 1px solid rgba(245, 179, 42, 0.45);
  box-shadow: 0 14px 30px -10px rgba(5, 12, 24, 0.75);
  transition: background 0.4s, transform 0.4s var(--ease-out);
}
.proc-step:hover .proc-step__node { background: var(--gold-500); transform: scale(1.06); }
.proc-step__node span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--gold-400);
  transition: color 0.4s;
}
.proc-step:hover .proc-step__node span { color: var(--navy-950); }

.proc-step__img {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(127, 163, 196, 0.18);
  margin-bottom: 18px;
  aspect-ratio: 16 / 9;
}
.proc-step__img img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
  transition: transform 0.7s var(--ease-out), filter 0.5s;
}
.proc-step:hover .proc-step__img img { transform: scale(1.05); filter: saturate(1); }

.proc-step h3 {
  font-size: 22px;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.proc-step p { color: var(--steel-300); font-size: 14px; }

/* ==========================================================================
   PARTNERS
   ========================================================================== */
.partners { background: var(--navy-950); }

.partner-wall {
  margin-top: clamp(40px, 6vw, 64px);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid rgba(127, 163, 196, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(18, 37, 65, 0.35);
}
.partner-cell {
  display: grid;
  place-items: center;
  padding: clamp(24px, 3vw, 40px) 16px;
  border-right: 1px solid rgba(127, 163, 196, 0.14);
  border-bottom: 1px solid rgba(127, 163, 196, 0.14);
  transition: background 0.4s, transform 0.4s var(--ease-out);
}
.partner-cell:nth-child(6n) { border-right: none; }
.partner-cell:nth-last-child(-n + 6) { border-bottom: none; }
.partner-cell:hover { background: rgba(245, 179, 42, 0.07); transform: scale(1.04); z-index: 1; }
.partner-cell img {
  max-height: 52px;
  width: auto;
  max-width: 78%;
  /* 黑底 logo：screen 混合去掉黑底，默认灰白单色，hover 恢复彩色 */
  mix-blend-mode: screen;
  filter: grayscale(1) brightness(1.5) opacity(0.85);
  transition: filter 0.4s, transform 0.4s var(--ease-out);
}
.partner-cell:hover img { filter: grayscale(0) brightness(1.1); transform: scale(1.06); }

.partner-quote {
  margin-top: clamp(36px, 5vw, 52px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}
.partner-quote blockquote {
  max-width: 720px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 300;
  color: var(--mist-100);
  line-height: 1.5;
}
.partner-quote blockquote strong { color: var(--gold-400); font-weight: 600; }
.partner-quote .quote-mark {
  font-family: var(--font-display);
  font-size: 110px;
  line-height: 0.6;
  color: rgba(245, 179, 42, 0.35);
  user-select: none;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact {
  position: relative;
  background:
    radial-gradient(90% 70% at 12% 0%, rgba(36, 70, 110, 0.5), transparent 60%),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
  overflow: hidden;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
  position: relative;
  z-index: 1;
}

.contact__info { display: grid; gap: 18px; margin-top: 34px; }
.contact-row {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 20px 22px;
  border: 1px solid rgba(127, 163, 196, 0.18);
  border-radius: 12px;
  background: rgba(18, 37, 65, 0.4);
  transition: border-color 0.35s, transform 0.35s var(--ease-out);
}
.contact-row:hover { border-color: rgba(245, 179, 42, 0.45); transform: translateX(6px); }
.contact-row__icon {
  flex: none;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(245, 179, 42, 0.12);
  border: 1px solid rgba(245, 179, 42, 0.3);
}
.contact-row__icon svg { width: 20px; height: 20px; stroke: var(--gold-400); }
.contact-row b {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-300);
  margin-bottom: 4px;
}
.contact-row p, .contact-row a { color: var(--mist-100); font-size: 15px; line-height: 1.55; }
.contact-row a:hover { color: var(--gold-400); }

.contact__panel {
  background: rgba(10, 22, 40, 0.75);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(127, 163, 196, 0.22);
  border-radius: 18px;
  padding: clamp(28px, 3.4vw, 44px);
  box-shadow: var(--shadow-card);
  position: relative;
}
.contact__panel::before {
  content: "";
  position: absolute;
  top: -1px; left: 24px; right: 55%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-400), transparent);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-300);
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid rgba(127, 163, 196, 0.28);
  background: rgba(5, 12, 24, 0.6);
  color: var(--white);
  font: inherit;
  font-size: 14.5px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--steel-300) 50%), linear-gradient(135deg, var(--steel-300) 50%, transparent 50%); background-position: calc(100% - 22px) 50%, calc(100% - 16px) 50%; background-size: 6px 6px; background-repeat: no-repeat; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--gold-500);
  box-shadow: 0 0 0 3px rgba(245, 179, 42, 0.18);
}
.field textarea { resize: vertical; min-height: 110px; }

.form-note {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--steel-300);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.form-status {
  margin-top: 14px;
  font-size: 14px;
  color: var(--gold-400);
  display: none;
}
.form-status.is-visible { display: block; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid rgba(127, 163, 196, 0.14);
  background: var(--navy-950);
  padding: 44px 0 34px;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__brand { display: flex; align-items: center; gap: 14px; }
.footer__brand img {
  height: 40px; width: auto;
  /* 黑底 logo：screen 混合融入深色页脚 */
  mix-blend-mode: screen;
  filter: brightness(1.1);
}
.footer__brand span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
  text-transform: uppercase;
}
.footer__nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer__nav a {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-300);
  transition: color 0.3s;
}
.footer__nav a:hover { color: var(--gold-400); }
.footer__copy {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(127, 163, 196, 0.1);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--steel-400);
}

/* Back to top */
.totop {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gold-500);
  color: var(--navy-950);
  box-shadow: 0 14px 30px -10px rgba(245, 179, 42, 0.6);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.4s, transform 0.4s var(--ease-out), background 0.3s;
}
.totop.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.totop:hover { background: var(--gold-400); }

/* ==========================================================================
   SCROLL REVEAL
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1080px) {
  .prod__grid { grid-template-columns: repeat(2, 1fr); }
  .proc__timeline { grid-template-columns: repeat(2, 1fr); }
  .proc__timeline::before { display: none; }
  .partner-wall { grid-template-columns: repeat(3, 1fr); }
  .partner-cell:nth-child(6n) { border-right: 1px solid rgba(127, 163, 196, 0.14); }
  .partner-cell:nth-child(3n) { border-right: none; }
  .partner-cell:nth-last-child(-n + 3) { border-bottom: none; }
  .adv-card--map, .adv-card--quarter { grid-column: span 12; }
  .adv-card--half, .adv-card--facility { grid-column: span 12; }
}

@media (max-width: 860px) {
  .nav__links {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 18px var(--gutter) 30px;
    background: rgba(6, 13, 24, 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(127, 163, 196, 0.16);
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s, transform 0.4s var(--ease-out);
  }
  .nav.is-open .nav__links { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a { padding: 12px 0; font-size: 15px; width: 100%; border-bottom: 1px solid rgba(127, 163, 196, 0.08); }
  .nav__cta { margin: 16px 0 0; }
  .nav__burger { display: flex; }

  .about__grid, .contact__grid { grid-template-columns: 1fr; }
  .about__img-sub { left: auto; right: -8px; bottom: -40px; width: 42%; }
  .about__visual { margin-bottom: 48px; }

  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid rgba(217, 228, 239, 0.1); }
  .stat:nth-child(2n) { border-right: none; }
}

@media (max-width: 620px) {
  .prod__grid, .proc__timeline, .form-grid { grid-template-columns: 1fr; }
  .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .partner-cell { border-right: 1px solid rgba(127, 163, 196, 0.14) !important; }
  .partner-cell:nth-child(2n) { border-right: none !important; }
  .partner-cell:nth-last-child(-n + 2) { border-bottom: none !important; }
  .adv-card--facility { flex-direction: column; align-items: stretch; }
  .adv-card--facility img { width: 100%; }
  .section-tag { display: none; }
  .nav__brand-text b { font-size: 16px; }
  .hero h1 { font-size: clamp(34px, 9vw, 54px); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}