/* ===========================
   臻元科技 — 灯塔舍 LiteHaus
   Lighthouse Editorial Style
   =========================== */

/* --- Design Tokens --- */
:root {
  --color-bg:          #0A0E1A;
  --color-bg-alt:      #0D1225;
  --color-bg-card:     #111730;
  --color-surface:     #161D38;
  --color-gold:        #D4A853;
  --color-gold-light:  #E8C876;
  --color-gold-dim:    #A07D3A;
  --color-text:        #E8E6E3;
  --color-text-muted:  #8B8FA3;
  --color-text-dim:    #5A5F76;
  --color-border:      rgba(212, 168, 83, 0.15);
  --color-border-light:rgba(212, 168, 83, 0.08);

  --font-display: 'Playfair Display', 'Noto Serif SC', serif;
  --font-body:    'DM Sans', 'Noto Serif SC', sans-serif;
  --font-cn:      'Noto Serif SC', serif;

  --fs-xs:  0.75rem;
  --fs-sm:  0.875rem;
  --fs-base:1rem;
  --fs-md:  1.125rem;
  --fs-lg:  1.25rem;
  --fs-xl:  1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.75rem;
  --fs-4xl: 3.5rem;
  --fs-hero:clamp(2.5rem, 5vw, 4.5rem);

  --spacing-xs:  0.5rem;
  --spacing-sm:  1rem;
  --spacing-md:  1.5rem;
  --spacing-lg:  2rem;
  --spacing-xl:  3rem;
  --spacing-2xl: 5rem;
  --spacing-3xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-gold-light); }

ul { list-style: none; }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
}
.btn--gold {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dim));
  color: var(--color-bg);
}
.btn--gold:hover {
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(212, 168, 83, 0.25);
}
.btn--outline {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
}
.btn--outline:hover {
  background: rgba(212, 168, 83, 0.08);
  color: var(--color-gold-light);
}
.btn--lg {
  padding: 1rem 2.25rem;
  font-size: var(--fs-base);
}

/* --- Eyebrow --- */
.philosophy__eyebrow,
.services__eyebrow,
.method__eyebrow,
.contact__eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--spacing-md);
}

/* ===========================
   Nav
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: all var(--transition);
}
.nav--scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border-light);
}
.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
}
.nav__logo:hover { color: var(--color-text); }
.nav__logo-text {
  font-family: var(--font-cn);
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}
.nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  text-decoration: none;
}
.nav__link:hover { color: var(--color-gold); }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
  border-radius: 2px;
}
.nav__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__hamburger.active span:nth-child(2) { opacity: 0; }
.nav__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===========================
   Hero
   =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--spacing-3xl) var(--spacing-lg);
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.hero__beam {
  position: absolute;
  width: 200%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  opacity: 0.15;
}
.hero__beam--1 {
  top: 25%;
  left: -50%;
  transform: rotate(-15deg);
  animation: beamDrift 8s ease-in-out infinite;
}
.hero__beam--2 {
  top: 55%;
  left: -50%;
  transform: rotate(5deg);
  animation: beamDrift 12s ease-in-out infinite reverse;
  opacity: 0.1;
}
.hero__beam--3 {
  top: 40%;
  left: -50%;
  transform: rotate(-25deg);
  animation: beamDrift 10s ease-in-out infinite;
  animation-delay: -4s;
  opacity: 0.08;
}
@keyframes beamDrift {
  0%, 100% { transform: rotate(-15deg) translateX(-10%); }
  50%      { transform: rotate(-15deg) translateX(10%); }
}
.hero__noise {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  background-repeat: repeat;
  opacity: 0.5;
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}
.hero__eyebrow {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: var(--spacing-md);
}
.hero__title {
  font-family: var(--font-cn);
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-text) 40%, var(--color-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}
.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  color: var(--color-text-dim);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

/* ===========================
   Marquee Bar
   =========================== */
.marquee-bar {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  overflow: hidden;
  padding: 1rem 0;
}
.marquee-bar__track {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  width: max-content;
  animation: marqueeScroll 25s linear infinite;
}
.marquee-bar__item {
  font-family: var(--font-cn);
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.marquee-bar__dot {
  color: var(--color-gold-dim);
  font-size: var(--fs-xs);
}
@keyframes marqueeScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ===========================
   Philosophy
   =========================== */
.philosophy {
  padding: var(--spacing-3xl) 0;
}
.philosophy__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}
.philosophy__title {
  font-family: var(--font-cn);
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.philosophy__text {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}
.philosophy__stats {
  display: flex;
  gap: var(--spacing-xl);
}
.philosophy__stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.philosophy__stat-number {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-gold);
}
.philosophy__stat-label {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ===========================
   Services
   =========================== */
.services {
  padding: var(--spacing-3xl) 0;
  background: var(--color-bg-alt);
}
.services__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}
.services__title {
  font-family: var(--font-cn);
  font-size: var(--fs-3xl);
  font-weight: 700;
}
.services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}
.service-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  transition: all var(--transition);
  overflow: hidden;
}
.service-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.service-card--featured {
  border-color: rgba(212, 168, 83, 0.25);
  background: linear-gradient(135deg, var(--color-bg-card), rgba(212, 168, 83, 0.05));
}
.service-card__number {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--color-gold);
  opacity: 0.2;
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
}
.service-card__icon {
  margin-bottom: var(--spacing-lg);
}
.service-card__title {
  font-family: var(--font-cn);
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}
.service-card__subtitle {
  color: var(--color-gold);
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
}
.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.service-card__list li {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  padding-left: 1.25rem;
  position: relative;
}
.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
  opacity: 0.6;
}
.service-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}
.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-gold);
  transition: gap var(--transition);
}
.service-card__link:hover {
  color: var(--color-gold-light);
  gap: 0.75rem;
}

/* ===========================
   Method
   =========================== */
.method {
  padding: var(--spacing-3xl) 0;
}
.method__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}
.method__title {
  font-family: var(--font-cn);
  font-size: var(--fs-3xl);
  font-weight: 700;
}
.method__timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}
.method__line {
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
  opacity: 0.2;
}
.method__step {
  position: relative;
  display: flex;
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-2xl);
}
.method__step:last-child { padding-bottom: 0; }
.method__step-marker {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  position: relative;
  z-index: 1;
}
.method__step-number {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-gold);
}
.method__step-content {
  padding-top: 0.5rem;
}
.method__step-title {
  font-family: var(--font-cn);
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}
.method__step-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ===========================
   Contact
   =========================== */
.contact {
  padding: var(--spacing-3xl) 0;
  background: var(--color-bg-alt);
}
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}
.contact__title {
  font-family: var(--font-cn);
  font-size: var(--fs-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
}
.contact__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}
.contact__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}
.contact__item svg { flex-shrink: 0; margin-top: 2px; }
.contact__item a { color: var(--color-text-muted); }
.contact__item a:hover { color: var(--color-gold); }

.contact__cta {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  overflow: hidden;
}
.contact__cta-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.contact__cta-geo {
  position: absolute;
}
.contact__cta-geo--1 {
  top: -10px;
  right: -10px;
  animation: geoRotate 15s linear infinite;
}
.contact__cta-geo--2 {
  bottom: 10px;
  left: 10px;
  animation: geoRotate 20s linear infinite reverse;
}
@keyframes geoRotate {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.contact__cta-title {
  font-family: var(--font-cn);
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  position: relative;
}
.contact__cta-text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  position: relative;
}

/* ===========================
   Footer
   =========================== */
.footer {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}
.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-family: var(--font-cn);
  font-weight: 600;
  text-decoration: none;
  margin-bottom: var(--spacing-md);
}
.footer__logo:hover { color: var(--color-text); }
.footer__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 300px;
}
.footer__heading {
  font-family: var(--font-cn);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer__links a {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-gold); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  font-size: var(--fs-xs);
  color: var(--color-text-dim);
}
.footer__bottom a {
  color: var(--color-text-dim);
}
.footer__bottom a:hover { color: var(--color-gold); }

/* ===========================
   Scroll Reveal
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal--delay-1 { transition-delay: 0.15s; }
.reveal--delay-2 { transition-delay: 0.3s; }
.reveal--delay-3 { transition-delay: 0.45s; }
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Mouse Glow
   =========================== */
.mouse-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 168, 83, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* ===========================
   Responsive — Tablet (≤1024px)
   =========================== */
@media (max-width: 1024px) {
  .philosophy__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  .services__grid {
    grid-template-columns: 1fr;
  }
  .contact__grid {
    grid-template-columns: 1fr;
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
  }
}

/* ===========================
   Responsive — Mobile (≤768px)
   =========================== */
@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 26, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    z-index: 999;
  }
  .nav__links.active { display: flex; }
  .nav__link { font-size: var(--fs-xl); }
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; z-index: 1001; }

  .hero {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
  .hero__title { font-size: clamp(2rem, 7vw, 3rem); }
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .philosophy,
  .services,
  .method,
  .contact {
    padding: var(--spacing-2xl) 0;
  }

  .philosophy__title,
  .services__title,
  .method__title,
  .contact__title {
    font-size: var(--fs-2xl);
  }

  .philosophy__stats {
    gap: var(--spacing-lg);
  }

  .method__step { gap: var(--spacing-md); }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  .footer__bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}