/* ============================================================
   LOCOM WEBSITE — CORE STYLES v2
   ============================================================ */
/* ── Font loading strategy ── */
@font-face{font-family:'Inter';font-style:normal;font-weight:400 700;font-display:swap;src:local('Inter'),local('Arial')}

:root {
  --deep: #0A1F3F;
  --mid: #163A5F;
  --accent: #F47920;
  --light: #F5F7FA;
  --white: #FFFFFF;
  --text: #1A1A2E;
  --text-dim: #6B7280;
  --radius: 12px;
  --shadow: 0 20px 60px rgba(10,31,63,0.08);
}

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

/* ── Utility ── */
.flex-center{ display:flex; justify-content:center; align-items:center }
.text-center{ text-align:center }
.text-uc{ text-transform:uppercase; letter-spacing:0.12em }
.bg-deep{ background:linear-gradient(135deg,var(--deep),var(--mid)) }
.bg-light{ background:linear-gradient(135deg,var(--light),#E8ECF1) }

body{
  font-family: 'Inter','Be Vietnam Pro',-apple-system,BlinkMacSystemFont,sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Navbar ── */
.nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 40px;
  background: transparent;
  transition: background .3s, box-shadow .3s;
}
.nav.scrolled{ background: rgba(10,31,63,0.92); backdrop-filter: blur(20px); box-shadow: 0 1px 0 rgba(255,255,255,0.08) }
.nav-logo{
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 700; color: var(--white); letter-spacing: 0.02em;
}
.nav-logo .logo-img{
  width: auto; height: 1.3em; object-fit: contain;
  vertical-align: middle;
}
.nav-logo .logo-text{
  font-size: 1.3rem; font-weight: 700; color: var(--white); letter-spacing: 0.05em;
  margin-left: 10px;
}
.nav-links{ display: flex; align-items: center; gap: 32px }
.nav-links a{
  color: rgba(255,255,255,0.75); text-decoration: none; font-size: 0.9rem;
  font-weight: 500; transition: color .2s;
}
.nav-links a:hover{ color: var(--white) }
.lang-switch{
  display: flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.08); border-radius: 20px; padding: 4px 6px;
}
.lang-btn{
  display: inline-block; padding: 6px 12px; border-radius: 16px; border: none; cursor: pointer;
  font-size: 0.8rem; font-weight: 600; background: transparent; color: rgba(255,255,255,0.55);
  text-decoration: none; transition: all .2s;
}
.lang-btn.active{ background: var(--accent); color: #fff }
.lang-btn:not(.active):hover{ color: rgba(255,255,255,0.9) }

/* ── Sections ── */
.page{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0) }
.page.active{ position:relative; left:auto; width:auto; height:auto; overflow:visible; clip:auto }
.section{ min-height: 100vh; display: flex; align-items: center; position: relative }

/* ── Home Hero ── */
.hero{
  min-height: 100vh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center;
  background: linear-gradient(135deg, #0A1F3F 0%, #102A52 30%, #163A5F 60%, #0A1F3F 100%);
  color: var(--white); position: relative; overflow: hidden;
}
.hero::before{
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 40%, rgba(244,121,32,0.12) 0%, transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(255,255,255,0.04) 0%, transparent 50%);
}
.hero-content{ position: relative; z-index: 2; max-width: 800px; padding: 0 24px }
.hero h1{ font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 16px }
.hero h1 .brand{ color: var(--accent) }
.hero .tagline{ font-size: clamp(1.1rem, 2.5vw, 1.6rem); font-weight: 400; opacity: 0.85; margin-bottom: 12px }
.hero .subtag{ font-size: 0.95rem; opacity: 0.55; margin-bottom: 40px; max-width: 600px; margin-inline: auto }
.hero-cta{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 36px; border-radius: 30px; border: none; cursor: pointer;
  background: var(--accent); color: #fff; font-size: 1rem; font-weight: 600;
  letter-spacing: 0.01em; transition: transform .2s, box-shadow .2s;
}
.hero-cta:hover{ transform: translateY(-2px); box-shadow: 0 8px 30px rgba(244,121,32,0.35) }
.hero-bottom{
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.35); font-size: 0.75rem; letter-spacing: 0.1em;
  text-transform: uppercase; cursor: pointer; z-index: 2;
  animation: bounce 2s infinite;
}
@keyframes bounce{ 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(8px)} }

/* ── Business Sections (Apple-style scroll) ── */
.biz-section{
  min-height: 90vh; display: flex; align-items: center; padding: 80px 40px;
  content-visibility: auto; contain-intrinsic-size: 500px;
}
.biz-section .biz-wrap{ display: flex; align-items: center; gap: 80px; max-width: 1200px; margin: 0 auto; width: 100% }
.biz-section.reverse .biz-wrap{ flex-direction: row-reverse }
.biz-visual{
  flex: 1; height: 420px; border-radius: 20px; display: flex;
  align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.biz-visual .placeholder{
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.3); font-size: 0.75rem;
}
.biz-visual .placeholder .emoji{ font-size: 4rem; opacity: 0.5 }
.biz-text{ flex: 1; max-width: 480px }
.biz-text .biz-label{ font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 16px }
.biz-text h2{ font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; color: var(--deep) }
.biz-text p{ font-size: 1.05rem; color: var(--text-dim); line-height: 1.8; margin-bottom: 28px }
.biz-link{
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-weight: 600; text-decoration: none; font-size: 0.95rem;
  transition: gap .2s;
}
.biz-link:hover{ gap: 14px }
.biz-link svg{ width: 18px; height: 18px }

/* Business visual backgrounds */
.biz-visual.sms-bg{ background: linear-gradient(135deg,#EBF3FB,#D4E6F9) }
.biz-visual.geo-bg{ background: linear-gradient(135deg,#0A1F3F,#122A50) }
.biz-visual.cpe-bg{ background: linear-gradient(135deg,#F5F7FA,#E8ECF1) }

/* ── AI Token Visual ── */
.biz-visual.token-bg{
  background: linear-gradient(135deg,#0B1120 0%,#111B2F 30%,#162040 60%,#0B1120 100%);
  position: relative; overflow: hidden;
}
.token-visual-inner{
  position: relative; z-index: 2; width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px;
}
.token-badge{
  background: linear-gradient(135deg,#F47920,#FF6B35);
  color: #fff; font-size: 1.1rem; font-weight: 800; letter-spacing: 0.04em;
  padding: 8px 24px; border-radius: 30px;
  box-shadow: 0 4px 24px rgba(244,121,32,0.35);
  animation: tokenPulse 2.5s ease-in-out infinite;
}
@keyframes tokenPulse{
  0%,100%{ box-shadow: 0 4px 24px rgba(244,121,32,0.35) }
  50%{ box-shadow: 0 4px 40px rgba(244,121,32,0.6) }
}
.token-models{
  display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
  max-width: 320px;
}
.token-models span{
  padding: 3px 10px; border-radius: 12px;
  background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.5);
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.03em;
  border: 1px solid rgba(255,255,255,0.08);
  transition: all .3s;
}
.token-models span:hover{
  background: rgba(244,121,32,0.15); color: var(--accent);
  border-color: rgba(244,121,32,0.25);
}
.token-grid-bg{
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 70%);
}
.token-glow{
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(244,121,32,0.08) 0%, transparent 70%);
  z-index: 0; pointer-events: none;
}
/* Token detail header */
.token-detail-header{
  background: linear-gradient(135deg,#0B1120 0%,#111B2F 40%,#162040 70%,#0B1120 100%) !important;
}
.token-detail-header::before{
  background: radial-gradient(circle at 50% 40%, rgba(244,121,32,0.12) 0%, transparent 60%),
              radial-gradient(circle at 80% 50%, rgba(72,187,120,0.06) 0%, transparent 50%) !important;
}
/* Token card badge */
.token-card{ position: relative; overflow: hidden }
.token-card .token-badge-sm{
  display: inline-block; margin-top: 8px; padding: 2px 10px;
  border-radius: 10px; font-size: 0.75rem; font-weight: 700;
  background: rgba(244,121,32,0.1); color: var(--accent);
}
.token-save{
  display: inline-block; padding: 2px 8px; border-radius: 6px;
  background: rgba(72,187,120,0.12); color: #2E8B57;
  font-size: 0.8rem; font-weight: 700;
}

/* ── Video Frame (企业短视频组件) ── */
.video-frame{
  position: absolute; inset: 0; z-index: 1;
  display: flex; align-items: center; justify-content: center;
}
.biz-video{
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.biz-video::-webkit-media-controls{ display: none !important }
.video-play-btn{
  position: absolute; z-index: 3;
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(244,121,32,0.88); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: transform .2s cubic-bezier(0.16,1,0.3,1), opacity .35s, background .2s;
  backdrop-filter: blur(8px); box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}
.video-play-btn:hover{ transform: scale(1.1); background: var(--accent) }
.video-play-btn svg{ width: 22px; height: 22px; margin-left: 3px }
/* Playing state — hide button, show on hover */
.video-frame.playing .video-play-btn{ opacity: 0; pointer-events: none }
.video-frame.playing:hover .video-play-btn{ opacity: 1; pointer-events: auto }
/* Pause icon when playing */
.video-frame.playing .play-icon{ display: none }
.video-frame.playing .pause-icon{ display: block }
.pause-icon{ display: none }
/* Poster overlay — fades out when video starts */
.video-poster-overlay{
  position: absolute; inset: 0; z-index: 2;
  background-size: cover; background-position: center;
  transition: opacity .5s cubic-bezier(0.16,1,0.3,1);
  pointer-events: none;
}
.video-frame.playing .video-poster-overlay{ opacity: 0 }
/* Loading spinner */
.video-spinner{
  position: absolute; z-index: 4;
  width: 28px; height: 28px; border: 2.5px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent); border-radius: 50%;
  animation: v-spin .7s linear infinite;
  opacity: 0; transition: opacity .2s;
}
.video-frame.loading .video-spinner{ opacity: 1 }
.video-frame.loading .video-play-btn{ opacity: 0 }
@keyframes v-spin{ to{ transform: rotate(360deg) } }
/* Bottom label */
.video-label{
  position: absolute; bottom: 20px; z-index: 3;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(255,255,255,0.55);
  pointer-events: none; transition: opacity .35s;
}
.video-frame.playing .video-label{ opacity: 0 }
/* Responsive video */
@media (max-width: 768px){
  .video-play-btn{ width: 48px; height: 48px }
  .video-play-btn svg{ width: 18px; height: 18px }
  .video-label{ bottom: 12px; font-size: 0.65rem }
}

/* ── Trust Bar ── */
.trust-bar{
  padding: 60px 40px; display: flex; justify-content: center; gap: 60px;
  flex-wrap: wrap; background: var(--deep); color: var(--white);
}
.trust-item{ text-align: center }
.trust-item .num{ font-size: 2.5rem; font-weight: 800; color: var(--accent) }
.trust-item .label{ font-size: 0.85rem; opacity: 0.7; margin-top: 4px }

/* ── CTA Footer ── */
.cta-footer{
  min-height: 50vh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 80px 24px;
  background: var(--light);
}
.cta-footer h2{ font-size: clamp(1.6rem,3vw,2.4rem); font-weight: 700; color: var(--deep); margin-bottom: 12px }
.cta-footer p{ font-size: 1.05rem; color: var(--text-dim); margin-bottom: 32px; max-width: 500px }

/* ── Detail Pages ── */
.detail-header{
  min-height: 55vh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 80px 24px 60px;
  background: var(--deep); color: var(--white); position: relative; overflow: hidden;
}
.detail-header::before{
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 60%, rgba(244,121,32,0.15) 0%, transparent 60%);
}
.detail-header h1{ font-size: clamp(2rem,4.5vw,3.5rem); font-weight: 800; margin-bottom: 12px; position: relative }
.detail-header .sub{ font-size: 1.05rem; opacity: 0.65; max-width: 560px; position: relative }
.back-btn{
  position: absolute; top: 100px; left: 40px;
  color: rgba(255,255,255,0.6); cursor: pointer; font-size: 0.9rem;
  display: flex; align-items: center; gap: 6px; transition: color .2s; z-index: 2;
}
.back-btn:hover{ color: var(--white) }

.detail-body{ max-width: 1000px; margin: 0 auto; padding: 60px 24px 80px }
.detail-body h3{ font-size: 1.5rem; font-weight: 700; color: var(--deep); margin: 48px 0 16px }
.detail-body h3:first-child{ margin-top: 0 }
.detail-body p{ font-size: 1rem; color: var(--text-dim); line-height: 1.8; margin-bottom: 20px }
.detail-body ul{ list-style: none; padding: 0 }
.detail-body ul li{ padding: 8px 0 8px 24px; position: relative; color: var(--text-dim) }
.detail-body ul li::before{ content: '•'; position: absolute; left: 0; color: var(--accent); font-weight: 700 }

/* Tables */
.comp-table{ width: 100%; border-collapse: collapse; margin: 24px 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow) }
.comp-table th,.comp-table td{ padding: 14px 20px; text-align: left; font-size: 0.9rem }
.comp-table th{ background: var(--deep); color: #fff; font-weight: 600 }
.comp-table td{ background: #fff; border-bottom: 1px solid #e5e7eb; color: var(--text-dim) }
.comp-table tr:last-child td{ border-bottom: none }

/* Cards grid */
.card-grid{ display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 24px; margin: 24px 0 }
.grid-2{ grid-template-columns: repeat(2,1fr) }
.grid-4{ grid-template-columns: repeat(auto-fit, minmax(220px,1fr)) }
.card{
  background: #fff; border-radius: var(--radius); padding: 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04); border: 1px solid #eee;
}
.card h4{ font-size: 1.05rem; font-weight: 700; color: var(--deep); margin-bottom: 8px }
.card .sub{ font-size: 0.85rem; color: var(--text-dim) }

/* Steps row */
.steps{ display: flex; gap: 32px; margin: 32px 0; flex-wrap: wrap }
.step{
  flex: 1; min-width: 240px; text-align: center; padding: 28px;
  background: #fff; border-radius: var(--radius); box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.step .step-num{ width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 800; margin-bottom: 16px }
.step h4{ font-size: 1rem; margin-bottom: 8px; color: var(--deep) }
.step p{ font-size: 0.85rem; color: var(--text-dim); line-height: 1.6 }

/* Case study highlight */
.case-study{
  background: linear-gradient(135deg,#FFF7F0,#FFEEDD); border-radius: var(--radius);
  padding: 36px; margin: 32px 0; border-left: 4px solid var(--accent);
}
.case-study .roi{ font-size: 1.4rem; font-weight: 800; color: var(--accent); margin-top: 16px }
.step .deliverable{ font-size: 0.85rem; color: var(--accent); margin-top: 10px; padding: 6px 12px; background: rgba(244,121,32,0.06); border-radius: 6px; font-weight: 600 }

/* About advantages */
.adv-grid{ display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; margin: 24px 0 }

/* Contact form */
.contact-wrap{ max-width: 1000px; margin: 0 auto; padding: 60px 24px; display: flex; gap: 60px; flex-wrap: wrap }
.contact-form{ flex: 1; min-width: 300px }
.contact-info{ flex: 1; min-width: 280px }
.form-group{ margin-bottom: 16px }
.form-group label{ display: block; font-size: 0.85rem; font-weight: 600; color: var(--deep); margin-bottom: 6px }
.form-group input,.form-group select,.form-group textarea{
  width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 8px;
  font-size: 0.9rem; font-family: inherit; transition: border-color .2s;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(244,121,32,0.1);
}
.form-group textarea{ min-height: 100px; resize: vertical }
.radio-group{ display: flex; flex-wrap: wrap; gap: 12px }
.radio-group label{ display: flex; align-items: center; gap: 6px; font-size: 0.85rem; cursor: pointer }
.submit-btn{
  width: 100%; padding: 14px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: transform .2s;
}
.submit-btn:hover{ transform: translateY(-2px) }

/* About */
.about-section{ max-width: 900px; margin: 0 auto; padding: 60px 24px }

/* Footer */
.site-footer{
  background: var(--deep); color: rgba(255,255,255,0.5); padding: 40px;
  text-align: center; font-size: 0.8rem;
}

/* ── Related Services (cross-links L2/L3) ── */
.related-services{
  background: var(--deep); color: #fff; padding: 56px 24px 8px;
}
.related-services .rs-title{
  font-size: 1.4rem; font-weight: 700; text-align: center; margin: 0 0 28px;
  color: #fff;
}
.rs-grid{
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
  max-width: 1000px; margin: 0 auto;
}
.rs-card{
  display: block; padding: 22px 24px; border-radius: var(--radius);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  text-decoration: none; transition: all .2s; cursor: pointer;
}
.rs-card:hover{
  background: rgba(255,255,255,0.12); border-color: var(--accent);
  transform: translateY(-2px);
}
.rs-name{
  display: block; font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 8px;
}
.rs-desc{
  display: block; font-size: 0.85rem; color: rgba(255,255,255,0.6); line-height: 1.6;
}
@media (max-width: 768px){
  .rs-grid{ grid-template-columns: 1fr }
}

/* Responsive */
@media (max-width: 768px){
  .nav{ padding: 12px 20px }
  .nav-links{ display: none }
  .biz-section{ padding: 50px 20px; min-height: auto }
  .biz-section .biz-wrap,.biz-section.reverse .biz-wrap{ flex-direction: column; gap: 32px }
  .biz-visual{ height: 240px; flex: none; width: 100% }
  .biz-text{ max-width: 100% }
  .trust-bar{ gap: 30px; padding: 40px 20px }
  .trust-item .num{ font-size: 1.8rem }
  .detail-body{ padding: 40px 16px }
  .comp-table th,.comp-table td{ padding: 10px 12px; font-size: 0.8rem }
  .steps{ flex-direction: column }
  .contact-wrap{ flex-direction: column; gap: 40px }
  .adv-grid,.grid-2{ grid-template-columns: 1fr }
  .back-btn{ left: 16px; top: 90px }
}

/* Tablet nav fix */
@media (max-width: 1024px){
  .nav-links a:not(:last-child){ display: none }
}