/* ===== 3H BIOSTECH - MAIN STYLESHEET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --deep-blue: #0A0E27;
  --deep-purple: #0D1B4B;
  --cyan: #00D4FF;
  --green: #00FFB3;
  --gold: #FFD700;
  --purple: #7B2FBE;
  --purple-light: #9B4FDE;
  --red-warn: #FF4444;
  --white: #FFFFFF;
  --w70: rgba(255,255,255,0.7);
  --w40: rgba(255,255,255,0.4);
  --shadow-cyan: 0 0 30px rgba(0,212,255,0.3);
  --glow-cyan: 0 0 20px rgba(0,212,255,0.6), 0 0 40px rgba(0,212,255,0.3);
  --glow-green: 0 0 20px rgba(0,255,179,0.6), 0 0 40px rgba(0,255,179,0.3);
  --font-cn: 'Noto Sans SC', sans-serif;
  --font-en: 'Orbitron', monospace;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font-cn); background: var(--deep-blue); color: var(--white); overflow-x: hidden; line-height: 1.7; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--deep-blue); }
::-webkit-scrollbar-thumb { background: var(--cyan); border-radius: 3px; }

/* NAV */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0 5%; height: 70px; display: flex; align-items: center; justify-content: space-between; background: rgba(10,14,39,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,212,255,0.15); transition: all 0.3s; }
nav.scrolled { height: 60px; background: rgba(10,14,39,0.95); border-bottom-color: rgba(0,212,255,0.3); }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-icon { width: 42px; height: 42px; background: linear-gradient(135deg, var(--cyan), var(--green)); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-family: var(--font-en); font-weight: 900; font-size: 14px; color: var(--deep-blue); box-shadow: var(--glow-cyan); }
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-family: var(--font-en); font-size: 16px; font-weight: 700; color: var(--white); letter-spacing: 2px; line-height: 1.1; }
.logo-sub { font-size: 10px; color: var(--cyan); letter-spacing: 1px; line-height: 1.1; }
.nav-links { display: flex; list-style: none; gap: 28px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--w70); font-size: 13px; font-weight: 500; letter-spacing: 1px; transition: color 0.3s; position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; right: 0; height: 1px; background: var(--cyan); transform: scaleX(0); transition: transform 0.3s; }
.nav-links a:hover { color: var(--cyan); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta { padding: 8px 20px; background: linear-gradient(135deg, var(--cyan), var(--green)); color: var(--deep-blue) !important; border-radius: 20px; font-weight: 700 !important; font-size: 12px !important; box-shadow: var(--shadow-cyan); transition: all 0.3s !important; }
.nav-cta:hover { transform: translateY(-1px); box-shadow: var(--glow-cyan) !important; }
.nav-cta::after { display: none !important; }
.nav-toggle { display: none; background: none; border: none; color: var(--white); font-size: 24px; cursor: pointer; padding: 8px; }

/* CANVAS */
#particleCanvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; opacity: 0.4; }
section { position: relative; z-index: 1; }

/* HERO */
#hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #0A0E27 0%, #0D1B4B 50%, #0F1535 100%); padding: 100px 5% 80px; overflow: hidden; }
.hero-bg-glow { position: absolute; top: 20%; left: 50%; transform: translate(-50%,-50%); width: 800px; height: 800px; background: radial-gradient(ellipse, rgba(0,212,255,0.12) 0%, transparent 70%); pointer-events: none; }
.hero-bg-glow2 { position: absolute; bottom: -10%; right: -5%; width: 600px; height: 600px; background: radial-gradient(ellipse, rgba(123,47,190,0.15) 0%, transparent 70%); pointer-events: none; }
.hero-content { max-width: 1200px; width: 100%; margin: 0 auto; text-align: center; position: relative; z-index: 2; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px; background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.3); border-radius: 20px; font-size: 12px; color: var(--cyan); letter-spacing: 2px; margin-bottom: 28px; animation: fadeInDown 1s ease forwards; }
.hero-badge .dot { width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; animation: pulse 2s infinite; }
.hero-title { font-size: clamp(36px,6vw,80px); font-weight: 900; line-height: 1.15; margin-bottom: 20px; background: linear-gradient(135deg,#fff 0%,#00D4FF 50%,#00FFB3 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; filter: drop-shadow(0 0 40px rgba(0,212,255,0.4)); animation: fadeInUp 1s ease 0.2s both; }
.hero-subtitle-cn { font-size: clamp(14px,2vw,20px); color: var(--w70); letter-spacing: 3px; margin-bottom: 12px; animation: fadeInUp 1s ease 0.4s both; }
.hero-subtitle-cn span { color: var(--cyan); font-weight: 700; }
.hero-subtitle-en { font-family: var(--font-en); font-size: clamp(10px,1.2vw,14px); color: var(--w40); letter-spacing: 2px; margin-bottom: 60px; animation: fadeInUp 1s ease 0.6s both; }
.hero-cards { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 50px; animation: fadeInUp 1s ease 0.8s both; }
.hero-card { background: rgba(255,255,255,0.05); backdrop-filter: blur(20px); border: 1px solid rgba(0,212,255,0.2); border-radius: 16px; padding: 24px 28px; min-width: 200px; max-width: 240px; text-align: center; transition: all 0.4s; position: relative; overflow: hidden; }
.hero-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg,rgba(0,212,255,0.08),rgba(0,255,179,0.05)); opacity: 0; transition: opacity 0.4s; }
.hero-card:hover { transform: translateY(-8px); border-color: var(--cyan); box-shadow: var(--shadow-cyan), inset 0 0 30px rgba(0,212,255,0.05); }
.hero-card:hover::before { opacity: 1; }
.hero-card-icon { font-size: 36px; margin-bottom: 10px; display: block; }
.hero-card-en { font-family: var(--font-en); font-size: 11px; color: var(--cyan); letter-spacing: 2px; margin-bottom: 4px; }
.hero-card-cn { font-size: 18px; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.hero-card-desc { font-size: 12px; color: var(--w70); line-height: 1.6; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; animation: fadeInUp 1s ease 1s both; }
.btn-primary { padding: 14px 32px; background: linear-gradient(135deg,var(--cyan),var(--green)); color: var(--deep-blue); font-weight: 700; font-size: 14px; border: none; border-radius: 30px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; box-shadow: var(--shadow-cyan); transition: all 0.3s; letter-spacing: 1px; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--glow-cyan), var(--glow-green); }
.btn-secondary { padding: 14px 32px; background: transparent; color: var(--cyan); font-weight: 600; font-size: 14px; border: 1px solid var(--cyan); border-radius: 30px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; transition: all 0.3s; letter-spacing: 1px; backdrop-filter: blur(10px); }
.btn-secondary:hover { background: rgba(0,212,255,0.1); box-shadow: var(--shadow-cyan); transform: translateY(-3px); }
.hero-scroll-hint { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--w40); font-size: 11px; letter-spacing: 2px; animation: bounce 2s infinite; }
.scroll-arrow { width: 24px; height: 24px; border-right: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); transform: rotate(45deg); opacity: 0.6; }

/* DNA */
.dna-container { position: absolute; right: 5%; top: 50%; transform: translateY(-50%); width: 180px; height: 400px; opacity: 0.3; pointer-events: none; }
.dna-svg { width: 100%; height: 100%; }

/* SECTION HEADER */
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag { display: inline-block; padding: 5px 16px; background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.3); border-radius: 20px; font-size: 11px; color: var(--cyan); letter-spacing: 3px; margin-bottom: 16px; font-family: var(--font-en); }
.section-title { font-size: clamp(26px,4vw,42px); font-weight: 900; color: var(--white); margin-bottom: 12px; line-height: 1.3; }
.section-title span { color: var(--cyan); }
.section-desc { font-size: 15px; color: var(--w70); max-width: 600px; margin: 0 auto; }
.section-divider { width: 60px; height: 3px; background: linear-gradient(90deg,var(--cyan),var(--green)); margin: 16px auto 0; border-radius: 2px; }

/* ABOUT */
#about { padding: 100px 5%; background: linear-gradient(180deg,var(--deep-blue) 0%,rgba(13,27,75,0.5) 100%); }
.about-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.3fr 1fr; gap: 60px; align-items: center; }
.about-tag { display: inline-block; padding: 5px 16px; background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.3); border-radius: 20px; font-size: 11px; color: var(--cyan); letter-spacing: 3px; margin-bottom: 20px; font-family: var(--font-en); }
.about-title { font-size: clamp(28px,4vw,44px); font-weight: 900; margin-bottom: 20px; line-height: 1.2; }
.about-title span { color: var(--cyan); }
.about-text { font-size: 14px; color: var(--w70); line-height: 2; margin-bottom: 16px; }
.about-3h { display: flex; gap: 16px; margin-top: 30px; flex-wrap: wrap; }
.h-pill { padding: 8px 20px; border-radius: 20px; font-weight: 700; font-size: 13px; letter-spacing: 1px; }
.h-pill:nth-child(1) { background: rgba(0,212,255,0.15); border: 1px solid var(--cyan); color: var(--cyan); }
.h-pill:nth-child(2) { background: rgba(0,255,179,0.15); border: 1px solid var(--green); color: var(--green); }
.h-pill:nth-child(3) { background: rgba(255,215,0,0.15); border: 1px solid var(--gold); color: var(--gold); }
.about-stats { display: flex; flex-direction: column; gap: 20px; }
.stat-card { background: rgba(255,255,255,0.04); backdrop-filter: blur(20px); border: 1px solid rgba(0,212,255,0.15); border-radius: 16px; padding: 28px 32px; display: flex; align-items: center; gap: 20px; transition: all 0.4s; position: relative; overflow: hidden; }
.stat-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; }
.stat-card:nth-child(1)::before { background: var(--cyan); }
.stat-card:nth-child(2)::before { background: var(--green); }
.stat-card:nth-child(3)::before { background: var(--gold); }
.stat-card:hover { transform: translateX(5px); border-color: rgba(0,212,255,0.4); box-shadow: var(--shadow-cyan); }
.stat-num { font-family: var(--font-en); font-size: 42px; font-weight: 900; line-height: 1; }
.stat-card:nth-child(1) .stat-num { color: var(--cyan); }
.stat-card:nth-child(2) .stat-num { color: var(--green); }
.stat-card:nth-child(3) .stat-num { color: var(--gold); }
.stat-label { font-size: 16px; font-weight: 700; color: var(--white); margin-bottom: 4px; }
.stat-desc { font-size: 12px; color: var(--w40); }

/* CHALLENGE */
#challenge { padding: 100px 5%; background: linear-gradient(180deg,rgba(13,27,75,0.3) 0%,rgba(10,14,39,0.9) 100%); }
.challenge-container { max-width: 1200px; margin: 0 auto; }
.challenge-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; margin-bottom: 50px; }
.challenge-card { background: rgba(255,68,68,0.05); border: 1px solid rgba(255,68,68,0.2); border-radius: 16px; padding: 32px 24px; text-align: center; transition: all 0.4s; position: relative; overflow: hidden; }
.challenge-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg,transparent,var(--red-warn),transparent); opacity: 0.6; }
.challenge-card:hover { border-color: rgba(255,68,68,0.5); transform: translateY(-6px); box-shadow: 0 8px 30px rgba(255,68,68,0.15); }
.challenge-icon { font-size: 40px; margin-bottom: 16px; display: block; }
.challenge-title { font-size: 17px; font-weight: 700; color: #FF6B6B; margin-bottom: 12px; }
.challenge-desc { font-size: 13px; color: var(--w70); line-height: 1.8; }
.challenge-footer { text-align: center; padding: 28px; background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.15); border-radius: 16px; }
.challenge-footer p { font-size: 16px; color: var(--cyan); font-weight: 600; letter-spacing: 1px; }

/* SYSTEMS */
#systems { padding: 100px 5%; background: linear-gradient(180deg,rgba(10,14,39,0.9) 0%,rgba(13,27,75,0.6) 100%); }
.systems-container { max-width: 1200px; margin: 0 auto; }
.systems-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 50px; flex-wrap: wrap; }
.tab-btn { padding: 12px 28px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 30px; color: var(--w70); font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.3s; letter-spacing: 1px; }
.tab-btn.active { background: linear-gradient(135deg,var(--cyan),var(--green)); border-color: transparent; color: var(--deep-blue); box-shadow: var(--shadow-cyan); }
.tab-btn:hover:not(.active) { border-color: var(--cyan); color: var(--cyan); }
.system-panel { display: none; }
.system-panel.active { display: block; animation: fadeIn 0.5s ease; }
.system-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.system-icon-wrap { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.system-icon { font-size: 44px; line-height: 1; }
.system-badge { padding: 4px 14px; background: rgba(0,212,255,0.15); border: 1px solid rgba(0,212,255,0.4); border-radius: 20px; font-family: var(--font-en); font-size: 10px; color: var(--cyan); letter-spacing: 2px; }
.system-name { font-size: clamp(22px,3vw,32px); font-weight: 900; color: var(--white); margin-bottom: 6px; }
.system-subtitle { font-size: 15px; color: var(--cyan); margin-bottom: 24px; letter-spacing: 2px; }
.system-points { display: flex; flex-direction: column; gap: 16px; margin-bottom: 28px; }
.system-point { display: flex; align-items: flex-start; gap: 12px; }
.point-label { min-width: 70px; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; letter-spacing: 1px; text-align: center; flex-shrink: 0; }
.point-text { font-size: 13px; color: var(--w70); line-height: 1.8; }
.flow-steps { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.flow-step { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--white); background: rgba(255,255,255,0.06); border: 1px solid rgba(0,212,255,0.2); border-radius: 20px; padding: 6px 14px; }
.flow-arrow { color: var(--cyan); font-size: 16px; }
.system-visual { background: rgba(255,255,255,0.03); border: 1px solid rgba(0,212,255,0.15); border-radius: 20px; padding: 36px; position: relative; overflow: hidden; }
.system-visual::before { content: ''; position: absolute; top: -50%; right: -50%; width: 200%; height: 200%; background: radial-gradient(ellipse,rgba(0,212,255,0.06),transparent 60%); pointer-events: none; }
.visual-title { font-size: 13px; color: var(--cyan); letter-spacing: 2px; margin-bottom: 24px; text-transform: uppercase; font-family: var(--font-en); }
.capability-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.capability-item { background: rgba(0,212,255,0.05); border: 1px solid rgba(0,212,255,0.12); border-radius: 12px; padding: 16px 18px; display: flex; align-items: center; gap: 14px; transition: all 0.3s; }
.capability-item:hover { background: rgba(0,212,255,0.1); border-color: rgba(0,212,255,0.3); transform: translateX(4px); }
.cap-icon { font-size: 24px; flex-shrink: 0; }
.cap-title { font-size: 14px; font-weight: 700; color: var(--white); margin-bottom: 3px; }
.cap-text { font-size: 12px; color: var(--w40); }
.data-badge-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.data-badge { padding: 8px 16px; background: rgba(0,255,179,0.1); border: 1px solid rgba(0,255,179,0.3); border-radius: 8px; text-align: center; }
.data-badge-num { font-family: var(--font-en); font-size: 18px; font-weight: 700; color: var(--green); display: block; line-height: 1.2; }
.data-badge-label { font-size: 10px; color: var(--w40); }
.repair-layers { display: flex; flex-direction: column; gap: 12px; }
.repair-layer { display: flex; align-items: center; gap: 16px; padding: 16px 20px; border-radius: 12px; border: 1px solid; transition: all 0.3s; }
.repair-layer:nth-child(1) { background: rgba(0,212,255,0.08); border-color: rgba(0,212,255,0.2); }
.repair-layer:nth-child(2) { background: rgba(123,47,190,0.1); border-color: rgba(123,47,190,0.3); }
.repair-layer:nth-child(3) { background: rgba(255,215,0,0.08); border-color: rgba(255,215,0,0.25); }
.repair-layer:hover { transform: scale(1.02); }
.layer-icon { font-size: 28px; }
.layer-name { font-size: 14px; font-weight: 700; }
.repair-layer:nth-child(1) .layer-name { color: var(--cyan); }
.repair-layer:nth-child(2) .layer-name { color: var(--purple-light); }
.repair-layer:nth-child(3) .layer-name { color: var(--gold); }
.layer-desc { font-size: 12px; color: var(--w40); }
.health-formula { text-align: center; padding: 28px; background: rgba(0,255,179,0.06); border: 1px solid rgba(0,255,179,0.2); border-radius: 16px; margin-bottom: 24px; font-size: 20px; font-weight: 900; color: var(--green); letter-spacing: 2px; }
.health-elements { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.health-elem { text-align: center; padding: 20px 12px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 14px; transition: all 0.3s; }
.health-elem:hover { border-color: var(--green); box-shadow: 0 0 20px rgba(0,255,179,0.15); transform: translateY(-4px); }
.health-elem-icon { font-size: 30px; margin-bottom: 8px; display: block; }
.health-elem-title { font-size: 14px; font-weight: 700; color: var(--white); margin-bottom: 4px; }
.health-elem-sub { font-size: 11px; color: var(--w40); }
.health-quote { margin-top: 20px; padding: 16px 20px; border-left: 3px solid var(--green); background: rgba(0,255,179,0.05); border-radius: 0 12px 12px 0; font-size: 13px; color: var(--w70); font-style: italic; }

/* TECH */
#tech { padding: 100px 5%; background: linear-gradient(180deg,rgba(13,27,75,0.6) 0%,rgba(10,14,39,0.95) 100%); }
.tech-container { max-width: 1200px; margin: 0 auto; }
.tech-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.tech-card { background: rgba(255,255,255,0.04); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.08); border-radius: 18px; padding: 32px 28px; transition: all 0.4s; position: relative; overflow: hidden; }
.tech-card::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg,var(--cyan),var(--green)); transform: scaleX(0); transition: transform 0.4s; }
.tech-card:hover { border-color: rgba(0,212,255,0.3); transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.3), var(--shadow-cyan); }
.tech-card:hover::after { transform: scaleX(1); }
.tech-card-icon { font-size: 40px; margin-bottom: 16px; display: block; }
.tech-card-title { font-size: 17px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.tech-card-desc { font-size: 13px; color: var(--w40); line-height: 1.8; }
.tech-card:nth-child(1) { border-top-color: var(--cyan); }
.tech-card:nth-child(2) { border-top-color: var(--green); }
.tech-card:nth-child(3) { border-top-color: var(--gold); }
.tech-card:nth-child(4) { border-top-color: var(--purple-light); }
.tech-card:nth-child(5) { border-top-color: var(--cyan); }
.tech-card:nth-child(6) { border-top-color: var(--green); }

/* USERS */
#users { padding: 100px 5%; background: linear-gradient(180deg,rgba(10,14,39,0.95) 0%,rgba(13,27,75,0.5) 100%); }
.users-container { max-width: 1200px; margin: 0 auto; }
.users-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.user-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 18px; padding: 32px 24px; text-align: center; transition: all 0.4s; cursor: default; position: relative; overflow: hidden; }
.user-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg,rgba(0,212,255,0.06),rgba(0,255,179,0.04)); opacity: 0; transition: opacity 0.4s; border-radius: 18px; }
.user-card:hover { border-color: rgba(0,212,255,0.4); transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.3), var(--shadow-cyan); }
.user-card:hover::before { opacity: 1; }
.user-icon { font-size: 48px; margin-bottom: 16px; display: block; }
.user-title { font-size: 17px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.user-desc { font-size: 13px; color: var(--w40); line-height: 1.8; }

/* WORKFLOW */
#workflow { padding: 100px 5%; background: linear-gradient(180deg,rgba(13,27,75,0.5) 0%,rgba(10,14,39,0.95) 100%); }
.workflow-container { max-width: 1000px; margin: 0 auto; }
.steps-wrapper { position: relative; padding: 20px 0; }
.steps-line { position: absolute; left: 32px; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg,var(--cyan),var(--green)); opacity: 0.3; }
.step-item { display: flex; gap: 30px; align-items: flex-start; margin-bottom: 40px; position: relative; padding-left: 20px; opacity: 0; transform: translateX(-30px); transition: all 0.6s ease; }
.step-item.visible { opacity: 1; transform: translateX(0); }
.step-num { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg,rgba(0,212,255,0.2),rgba(0,255,179,0.1)); border: 2px solid var(--cyan); display: flex; align-items: center; justify-content: center; font-family: var(--font-en); font-size: 20px; font-weight: 700; color: var(--cyan); flex-shrink: 0; position: relative; z-index: 2; box-shadow: var(--shadow-cyan); }
.step-content { background: rgba(255,255,255,0.04); border: 1px solid rgba(0,212,255,0.15); border-radius: 16px; padding: 24px 28px; flex: 1; transition: all 0.3s; }
.step-content:hover { border-color: rgba(0,212,255,0.35); box-shadow: var(--shadow-cyan); }
.step-icon-title { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.step-icon { font-size: 28px; }
.step-name { font-size: 18px; font-weight: 700; color: var(--white); }
.step-desc { font-size: 14px; color: var(--w40); }

/* CONTACT */
#contact { padding: 100px 5%; background: linear-gradient(135deg,#0A0E27 0%,#0D1B4B 100%); position: relative; overflow: hidden; }
#contact::before { content: ''; position: absolute; top: -30%; left: -10%; width: 600px; height: 600px; background: radial-gradient(ellipse,rgba(0,212,255,0.08),transparent 70%); }
#contact::after { content: ''; position: absolute; bottom: -20%; right: -5%; width: 500px; height: 500px; background: radial-gradient(ellipse,rgba(123,47,190,0.1),transparent 70%); }
.contact-container { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; margin-top: 20px; }
.contact-info-title { font-size: 26px; font-weight: 700; color: var(--white); margin-bottom: 24px; }
.contact-company { font-family: var(--font-en); font-size: 18px; font-weight: 700; color: var(--cyan); margin-bottom: 6px; }
.contact-company-cn { font-size: 15px; color: var(--w70); margin-bottom: 30px; }
.contact-items { display: flex; flex-direction: column; gap: 16px; margin-bottom: 36px; }
.contact-item { display: flex; align-items: center; gap: 16px; padding: 16px 20px; background: rgba(255,255,255,0.04); border: 1px solid rgba(0,212,255,0.12); border-radius: 12px; transition: all 0.3s; }
.contact-item:hover { border-color: rgba(0,212,255,0.35); background: rgba(0,212,255,0.06); }
.contact-item-icon { font-size: 24px; flex-shrink: 0; }
.contact-item-label { font-size: 11px; color: var(--w40); letter-spacing: 1px; }
.contact-item-value { font-size: 15px; font-weight: 600; color: var(--white); }
.contact-promises { display: flex; gap: 12px; flex-wrap: wrap; }
.promise-tag { padding: 8px 16px; background: rgba(0,212,255,0.08); border: 1px solid rgba(0,212,255,0.2); border-radius: 8px; font-size: 12px; color: var(--cyan); font-weight: 600; }
.contact-form { background: rgba(255,255,255,0.04); backdrop-filter: blur(20px); border: 1px solid rgba(0,212,255,0.15); border-radius: 20px; padding: 40px; }
.form-title { font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 12px; color: var(--w70); margin-bottom: 8px; letter-spacing: 1px; }
.form-group input,.form-group textarea,.form-group select { width: 100%; padding: 12px 16px; background: rgba(255,255,255,0.06); border: 1px solid rgba(0,212,255,0.2); border-radius: 10px; color: var(--white); font-size: 14px; font-family: var(--font-cn); outline: none; transition: all 0.3s; }
.form-group input::placeholder,.form-group textarea::placeholder { color: var(--w40); }
.form-group input:focus,.form-group textarea:focus,.form-group select:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,212,255,0.1); background: rgba(0,212,255,0.05); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select option { background: #0D1B4B; color: var(--white); }
.btn-form { width: 100%; padding: 14px; background: linear-gradient(135deg,var(--cyan),var(--green)); color: var(--deep-blue); font-weight: 700; font-size: 15px; border: none; border-radius: 10px; cursor: pointer; letter-spacing: 2px; box-shadow: var(--shadow-cyan); transition: all 0.3s; }
.btn-form:hover { transform: translateY(-2px); box-shadow: var(--glow-cyan); }

/* FOOTER */
footer { padding: 40px 5%; background: rgba(5,8,20,0.98); border-top: 1px solid rgba(0,212,255,0.1); }
.footer-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
.footer-logo { font-family: var(--font-en); font-size: 22px; font-weight: 900; color: var(--cyan); letter-spacing: 4px; margin-bottom: 8px; }
.footer-tagline { font-size: 13px; color: var(--w40); letter-spacing: 4px; margin-bottom: 20px; }
.footer-divider { width: 100%; height: 1px; background: rgba(0,212,255,0.1); margin: 20px 0; }
.footer-copy { font-size: 12px; color: var(--w40); letter-spacing: 1px; }
.footer-copy span { color: var(--cyan); }
.footer-links { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-links a { color: var(--w40); text-decoration: none; font-size: 12px; transition: color 0.3s; }
.footer-links a:hover { color: var(--cyan); }

/* ANIMATIONS */
@keyframes fadeInDown { from{opacity:0;transform:translateY(-20px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeInUp { from{opacity:0;transform:translateY(30px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(8px)} }

/* SCROLL ANIMATIONS */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-40px); transition: all 0.7s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(40px); transition: all 0.7s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* UTILITIES */
.back-top { position: fixed; bottom: 30px; right: 30px; width: 46px; height: 46px; background: linear-gradient(135deg,var(--cyan),var(--green)); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 20px; color: var(--deep-blue); font-weight: 700; box-shadow: var(--shadow-cyan); transition: all 0.3s; z-index: 900; opacity: 0; pointer-events: none; }
.back-top.visible { opacity: 1; pointer-events: all; }
.back-top:hover { transform: scale(1.1); box-shadow: var(--glow-cyan); }
.notification { position: fixed; bottom: 30px; right: 30px; background: rgba(0,255,179,0.1); border: 1px solid var(--green); border-radius: 12px; padding: 16px 24px; color: var(--green); font-size: 14px; font-weight: 600; z-index: 9999; transform: translateY(100px); opacity: 0; transition: all 0.4s ease; backdrop-filter: blur(20px); max-width: 320px; }
.notification.show { transform: translateY(0); opacity: 1; }

/* RESPONSIVE */
@media(max-width:1024px){
  .about-container{grid-template-columns:1fr;gap:40px}
  .challenge-grid{grid-template-columns:repeat(2,1fr)}
  .system-layout{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .users-grid{grid-template-columns:repeat(2,1fr)}
  .contact-layout{grid-template-columns:1fr}
}
@media(max-width:768px){
  nav{padding:0 4%}
  .nav-links{display:none}
  .nav-links.open{display:flex;flex-direction:column;position:fixed;top:70px;left:0;right:0;bottom:0;background:rgba(10,14,39,0.97);padding:40px 5%;gap:24px;z-index:999}
  .nav-links.open a{font-size:18px}
  .nav-toggle{display:block}
  .hero-cards{flex-direction:column;align-items:center}
  .hero-card{max-width:100%;width:100%}
  .challenge-grid{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:1fr}
  .users-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .health-elements{grid-template-columns:1fr}
  .flow-steps{flex-direction:column;align-items:flex-start}
  .flow-arrow{display:none}
  .dna-container{display:none}
}
@media(max-width:480px){
  section{padding-left:4%;padding-right:4%}
  .hero-btns{flex-direction:column}
  .btn-primary,.btn-secondary{text-align:center;justify-content:center}
  .contact-form{padding:24px}
}