/* ===== Tokens ===== */
:root{
  --navy-950: #050f1a;
  --navy-900: #071c2e;
  --navy-800: #0b2740;
  --navy-700: #113353;
  --navy-600: #17436b;
  --blue-400: #4a8fc2;
  --blue-300: #7fb2d9;
  --foam-100: #eaf4fb;
  --foam-050: #f6fafd;
  --gold-400: #e8b95c;
  --gold-300: #f0cd85;
  --gold-600: #c8933a;
  --ink-900: #0a1f2f;
  --ink-700: #2a4356;
  --ink-500: #5c7488;

  --font-base: "PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,sans-serif;
  --font-serif: Georgia,"Songti SC","STSong",serif;

  --container: 1080px;
  --radius: 14px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-base);
  color: var(--ink-900);
  background: var(--foam-050);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1,h2,h3,p{ margin: 0; }
a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display: block; }
button{ font-family: inherit; cursor: pointer; }

.section-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.hl{ color: var(--gold-400); }

/* ===== Net texture backgrounds ===== */
.net-texture{
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: .12;
  background-image:
    repeating-linear-gradient(55deg, rgba(232,185,92,.6) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(-55deg, rgba(232,185,92,.6) 0 1px, transparent 1px 64px);
}
.net-texture--light{
  opacity: .07;
  background-image:
    repeating-linear-gradient(55deg, rgba(11,39,64,.6) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(-55deg, rgba(11,39,64,.6) 0 1px, transparent 1px 64px);
}

/* ===== Reveal animation ===== */
.reveal{
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in-view{ opacity: 1; transform: none; }

/* ===== Header ===== */
.site-header{
  position: fixed; top:0; left:0; right:0; z-index: 100;
  background: rgba(7,28,46,0);
  transition: background .35s ease, box-shadow .35s ease;
}
.site-header.scrolled{
  background: rgba(7,28,46,.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 24px rgba(0,0,0,.15);
}
.header-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo{ display: flex; align-items: baseline; gap: 6px; }
.logo-mark{
  font-family: var(--font-serif);
  font-size: 1.5rem; font-weight: 700;
  color: var(--gold-400);
  letter-spacing: .02em;
}
.logo-text{
  font-size: 1rem; font-weight: 600;
  color: var(--foam-100);
  letter-spacing: .12em;
}
.main-nav{ display: flex; gap: 36px; }
.main-nav a{
  color: var(--foam-100);
  font-size: .92rem;
  opacity: .85;
  position: relative;
  padding: 4px 0;
  transition: opacity .2s ease;
}
.main-nav a:hover{ opacity: 1; }
.main-nav a::after{
  content:"";
  position: absolute; left:0; right: 100%; bottom: -2px;
  height: 1px; background: var(--gold-400);
  transition: right .25s var(--ease);
}
.main-nav a:hover::after{ right: 0; }

.header-actions{ display: flex; align-items: center; gap: 18px; }
.lang-switch{
  display: flex;
  align-items: center;
  gap: 2px;
  border: 1px solid rgba(234,244,251,.35);
  border-radius: 999px;
  padding: 3px;
}
.lang-option{
  background: transparent;
  border: none;
  color: var(--foam-100);
  opacity: .55;
  border-radius: 999px;
  padding: 5px 11px;
  font-size: .82rem;
  font-family: inherit;
  letter-spacing: .02em;
  transition: opacity .2s ease, background .2s ease, color .2s ease;
}
.lang-option:hover{ opacity: .85; }
.lang-option.active{
  opacity: 1;
  color: var(--navy-950);
  background: var(--gold-400);
  font-weight: 600;
}

.nav-toggle{
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 32px; height: 32px;
  background: transparent; border: none;
}
.nav-toggle span{
  display: block; height: 2px; width: 100%;
  background: var(--foam-100);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}

/* ===== Buttons ===== */
.btn{
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s ease, color .2s ease;
}
.btn-primary{
  background: linear-gradient(135deg, var(--gold-300), var(--gold-600));
  color: var(--navy-950);
  box-shadow: 0 8px 24px rgba(232,185,92,.25);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 12px 28px rgba(232,185,92,.35); }
.btn-ghost{
  border: 1px solid rgba(234,244,251,.4);
  color: var(--foam-100);
}
.btn-ghost:hover{ border-color: var(--gold-400); color: var(--gold-300); transform: translateY(-2px); }

/* ===== Hero ===== */
.hero{
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(74,143,194,.35), transparent 55%),
    linear-gradient(160deg, var(--navy-950), var(--navy-800) 55%, var(--navy-700));
  overflow: hidden;
  padding: 120px 24px 100px;
}
.hero-inner{
  position: relative; z-index: 2;
  max-width: 760px;
  text-align: center;
}
.eyebrow{
  color: var(--gold-300);
  font-size: .85rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.eyebrow--dark{ color: var(--gold-600); }
.hero-title{
  display: flex; align-items: baseline; justify-content: center; gap: 14px;
  margin-bottom: 24px;
}
.hero-153{
  font-family: var(--font-serif);
  font-size: clamp(4.5rem, 12vw, 8rem);
  font-weight: 700;
  color: var(--foam-100);
  line-height: 1;
  letter-spacing: -.02em;
}
.hero-aisc{
  font-size: clamp(1.3rem, 3vw, 2rem);
  color: var(--gold-400);
  letter-spacing: .2em;
  font-weight: 600;
}
.hero-tagline{
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--foam-100);
  margin-bottom: 14px;
  font-weight: 500;
}
.hero-sub{
  font-size: 1rem;
  color: var(--blue-300);
  letter-spacing: .06em;
  margin-bottom: 44px;
}
.hero-cta{ display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

.wave-divider{
  position: absolute; left:0; right:0; bottom: -1px;
  width: 100%; height: 90px;
  z-index: 1;
}
.wave-divider path{ fill: var(--foam-050); }
.wave-divider--flip{ transform: scaleY(-1); }
.wave-divider--flip path{ fill: var(--navy-800); }
.resilience .wave-divider--flip path{ fill: var(--foam-050); }

/* ===== Story ===== */
.story{ position: relative; padding: 120px 0 100px; background: var(--foam-050); }
.section-title{
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  font-weight: 700;
  color: var(--foam-100);
  text-align: center;
  margin-bottom: 56px;
  line-height: 1.4;
}
.section-title--dark{ color: var(--ink-900); }
.story .section-title{ color: var(--ink-900); }

.story-card{
  background: #fff;
  border: 1px solid rgba(11,39,64,.08);
  border-radius: var(--radius);
  padding: 40px 44px;
  margin-bottom: 32px;
  box-shadow: 0 20px 50px rgba(11,39,64,.06);
}
.story-label{
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--gold-600);
  background: rgba(232,185,92,.12);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.story-text p{ margin-bottom: 16px; color: var(--ink-700); }
.story-text p:last-child{ margin-bottom: 0; }
.story-text strong{ color: var(--navy-800); }

.question-box{
  margin-top: 48px;
  padding: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: var(--foam-100);
  text-align: center;
}
.question-kicker{
  font-size: .85rem;
  letter-spacing: .12em;
  color: var(--gold-300);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.question-main{
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 700;
  margin-bottom: 18px;
}
.question-sub{
  color: var(--blue-300);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== Approach ===== */
.approach{
  position: relative;
  padding: 110px 0;
  background: var(--navy-800);
  color: var(--foam-100);
}
.approach .section-title{ color: var(--foam-100); }
.approach-grid{
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative; z-index: 2;
}
.approach-text p{ margin-bottom: 18px; color: var(--blue-300); }
.approach-text p:last-child{ margin-bottom: 0; }
.approach-text strong{ color: var(--foam-100); }

.approach-badge{ display: flex; justify-content: center; }
.badge-ring{
  width: 240px; height: 240px;
  border-radius: 50%;
  border: 1px solid rgba(232,185,92,.4);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px;
  position: relative;
  background: radial-gradient(circle at 50% 40%, rgba(232,185,92,.08), transparent 70%);
}
.badge-ring::before{
  content:"";
  position: absolute; inset: 16px;
  border-radius: 50%;
  border: 1px dashed rgba(232,185,92,.3);
}
.badge-label{ font-size: .78rem; letter-spacing: .14em; color: var(--gold-300); text-transform: uppercase; }
.badge-name{ font-family: var(--font-serif); font-size: 1.3rem; color: var(--foam-100); font-weight: 700; text-align: center; padding: 0 20px; }
.badge-sub{ font-size: .85rem; color: var(--blue-300); }

/* ===== Resilience ===== */
.resilience{
  position: relative;
  padding: 110px 0 0;
  background: var(--navy-700);
  color: var(--foam-100);
}
.resilience .section-title{ color: var(--foam-100); }
.resilience-body p{ margin-bottom: 18px; color: var(--blue-300); max-width: 760px; margin-left: auto; margin-right: auto; text-align: center; }
.resilience-body strong{ color: var(--foam-100); }
.resilience-quote{
  margin: 40px auto 0;
  max-width: 700px;
  text-align: center;
  padding: 36px 20px 100px;
}
.resilience-quote p{
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-style: italic;
  color: var(--gold-300);
  position: relative;
  line-height: 1.7;
}

/* ===== Services ===== */
.services{ padding: 110px 0 120px; background: var(--foam-050); text-align: center; }
.services-scope{
  max-width: 640px; margin: 0 auto 64px;
  color: var(--ink-500);
  font-size: 1.02rem;
}
.services-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  text-align: left;
}
.service-card{
  background: #fff;
  border: 1px solid rgba(11,39,64,.08);
  border-radius: var(--radius);
  padding: 36px 30px;
  box-shadow: 0 20px 50px rgba(11,39,64,.05);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.service-card:hover{ transform: translateY(-6px); box-shadow: 0 26px 60px rgba(11,39,64,.1); }
.service-icon{
  width: 52px; height: 52px;
  color: var(--gold-600);
  margin-bottom: 20px;
}
.service-card h3{ font-size: 1.15rem; color: var(--navy-900); margin-bottom: 10px; }
.service-card p{ color: var(--ink-500); font-size: .95rem; }

/* ===== Brand statement ===== */
.brand-statement{
  position: relative;
  padding: 110px 0;
  background: linear-gradient(135deg, var(--navy-950), var(--navy-800));
  text-align: center;
}
.brand-headline{
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  font-weight: 700;
  color: var(--foam-100);
  margin-bottom: 22px;
  position: relative; z-index: 2;
}
.brand-desc{
  max-width: 620px; margin: 0 auto;
  color: var(--blue-300);
  position: relative; z-index: 2;
}

.case-story{
  position: relative; z-index: 2;
  max-width: 720px;
  margin: 56px auto 0;
  text-align: left;
  background: rgba(234,244,251,.04);
  border: 1px solid rgba(234,244,251,.12);
  border-radius: var(--radius);
  padding: 40px 44px;
}
.case-label{
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--gold-300);
  background: rgba(232,185,92,.12);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.case-story-text p{ margin-bottom: 16px; color: var(--blue-300); }
.case-story-text p:last-child{ margin-bottom: 0; }
.case-story-text strong{ color: var(--foam-100); }
.case-story-text ul{ margin: 8px 0 20px; padding-left: 20px; }
.case-story-text li{ margin-bottom: 12px; color: var(--blue-300); }
.case-story-text li strong{ color: var(--gold-300); }
.case-story-source{
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(234,244,251,.12);
  font-size: .8rem;
  color: var(--blue-300);
  opacity: .7;
}

/* ===== Contact ===== */
.contact{ padding: 110px 0 130px; background: var(--foam-050); }
.contact .section-title{ margin-bottom: 14px; }
.contact-subtitle{ text-align: center; color: var(--ink-500); margin-bottom: 48px; }
.contact-form{
  max-width: 560px; margin: 0 auto;
  background: #fff;
  border: 1px solid rgba(11,39,64,.08);
  border-radius: var(--radius);
  padding: 44px;
  box-shadow: 0 20px 50px rgba(11,39,64,.06);
}
.form-row{ margin-bottom: 22px; }
.form-row label{
  display: block; margin-bottom: 8px;
  font-size: .88rem; font-weight: 600;
  color: var(--navy-800);
}
.form-row input, .form-row textarea{
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(11,39,64,.15);
  border-radius: 8px;
  font-family: inherit;
  font-size: .95rem;
  color: var(--ink-900);
  background: var(--foam-050);
  resize: vertical;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-row input:focus, .form-row textarea:focus{
  outline: none;
  border-color: var(--gold-400);
  box-shadow: 0 0 0 3px rgba(232,185,92,.15);
}
.hp-field{
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.contact-form .btn{ width: 100%; border: none; }
.contact-form .btn:disabled{ opacity: .6; cursor: not-allowed; transform: none; }
.form-success{
  margin-top: 16px;
  text-align: center;
  color: var(--gold-600);
  font-weight: 600;
  font-size: .92rem;
}
.form-error{
  margin-top: 16px;
  text-align: center;
  color: #c0392b;
  font-weight: 600;
  font-size: .92rem;
}

/* ===== Footer ===== */
.site-footer{ background: var(--navy-950); padding: 48px 0; text-align: center; }
.footer-inner{ display: flex; flex-direction: column; align-items: center; gap: 12px; }
.footer-brand{ display: flex; align-items: baseline; gap: 6px; margin-bottom: 6px; }
.footer-scope, .footer-copy{ color: rgba(234,244,251,.5); font-size: .82rem; }

/* ===== Responsive ===== */
@media (max-width: 860px){
  .approach-grid{ grid-template-columns: 1fr; }
  .approach-badge{ order: -1; }
  .services-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .main-nav{
    position: fixed; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(7,28,46,.98);
    backdrop-filter: blur(8px);
    max-height: 0; overflow: hidden;
    transition: max-height .3s var(--ease);
  }
  .main-nav.open{ max-height: 320px; }
  .main-nav a{
    padding: 18px 24px;
    border-bottom: 1px solid rgba(234,244,251,.08);
  }
  .nav-toggle{ display: flex; }
  .header-actions{ gap: 12px; }
  .story-card{ padding: 28px 24px; }
  .question-box{ padding: 32px 24px; }
}