/* ============================================================
   自由人科技 - Premium Corporate Website
   Design Language: Industrial Precision × Optical Tech Aesthetic
   Typography: Noto Sans SC + DM Sans
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Primary Palette */
  --c-primary: #0055FF;
  --c-primary-dark: #003DB3;
  --c-primary-light: #E8F0FF;
  --c-accent: #00D4AA;
  --c-accent-dark: #00A886;

  /* Neutrals */
  --c-bg: #FFFFFF;
  --c-bg-alt: #F6F8FB;
  --c-bg-dark: #0A0F1A;
  --c-bg-dark-alt: #111827;
  --c-surface: #FFFFFF;
  --c-border: #E2E8F0;
  --c-border-light: #F1F5F9;

  /* Text */
  --c-text: #1A202C;
  --c-text-secondary: #64748B;
  --c-text-muted: #94A3B8;
  --c-text-inverse: #FFFFFF;
  --c-text-inverse-secondary: #94A3B8;

  /* Typography Scale */
  --f-display: clamp(2.5rem, 5vw, 4.5rem);
  --f-h1: clamp(2rem, 4vw, 3.5rem);
  --f-h2: clamp(1.75rem, 3.5vw, 2.75rem);
  --f-h3: clamp(1.25rem, 2vw, 1.75rem);
  --f-h4: clamp(1.1rem, 1.5vw, 1.35rem);
  --f-body: 1rem;
  --f-small: 0.875rem;
  --f-caption: 0.75rem;

  /* Spacing */
  --s-xs: 0.25rem;
  --s-sm: 0.5rem;
  --s-md: 1rem;
  --s-lg: 1.5rem;
  --s-xl: 2rem;
  --s-2xl: 3rem;
  --s-3xl: 4rem;
  --s-4xl: 6rem;
  --s-5xl: 8rem;

  /* Radius */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 24px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* Layout */
  --container-max: 1280px;
  --container-narrow: 960px;
  --header-height: 72px;
}

/* --- 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: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: var(--f-body);
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  overflow-x: hidden;
}

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

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--s-xl); }
.container--narrow { max-width: var(--container-narrow); }

/* --- Typography --- */
.display { font-size: var(--f-display); font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; }
.h1 { font-size: var(--f-h1); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
.h2 { font-size: var(--f-h2); font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; }
.h3 { font-size: var(--f-h3); font-weight: 600; line-height: 1.3; }

.text-gradient {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: var(--f-small); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--c-primary); margin-bottom: var(--s-md);
  display: flex; align-items: center; gap: var(--s-sm);
}
.section-label::before { content: ''; width: 24px; height: 2px; background: var(--c-primary); display: inline-block; }
.section-title { margin-bottom: var(--s-lg); }
.section-desc { color: var(--c-text-secondary); font-size: 1.1rem; max-width: 640px; line-height: 1.7; }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; gap: var(--s-sm); padding: 0.75rem 1.75rem; font-size: var(--f-small); font-weight: 600; border-radius: var(--r-md); transition: all var(--duration-normal) var(--ease-out); white-space: nowrap; }
.btn--primary { background: var(--c-primary); color: var(--c-text-inverse); }
.btn--primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,85,255,0.3); }
.btn--outline { border: 1.5px solid var(--c-border); color: var(--c-text); background: transparent; }
.btn--outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn--ghost { color: var(--c-primary); padding: 0.5rem 0; }
.btn--ghost:hover { color: var(--c-primary-dark); }
.btn--ghost::after { content: ' →'; transition: transform var(--duration-normal) var(--ease-out); }
.btn--ghost:hover::after { transform: translateX(4px); }
.btn--lg { padding: 1rem 2.25rem; font-size: var(--f-body); }

/* --- Header --- */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--header-height); background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,0,0,0.04); transition: all var(--duration-normal) var(--ease-out); }
.header.scrolled { box-shadow: var(--shadow-md); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.header__logo { display: flex; align-items: center; gap: var(--s-sm); font-weight: 700; font-size: 1.25rem; color: var(--c-text); flex-shrink: 0; }
.header__logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); border-radius: var(--r-md); display: flex; align-items: center; justify-content: center; color: white; font-size: 0.8rem; font-weight: 800; }
.header__nav { display: flex; align-items: center; gap: var(--s-xs); }
.header__nav-link { padding: 0.5rem 1rem; font-size: var(--f-small); font-weight: 500; color: var(--c-text-secondary); border-radius: var(--r-md); transition: all var(--duration-fast) var(--ease-out); position: relative; }
.header__nav-link:hover, .header__nav-link.active { color: var(--c-text); background: var(--c-bg-alt); }
.header__nav-link.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--c-primary); border-radius: 1px; }
.header__nav-dropdown { position: relative; }
.header__nav-dropdown-menu { position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%); background: var(--c-surface); border: 1px solid var(--c-border-light); border-radius: var(--r-lg); padding: var(--s-sm); min-width: 200px; box-shadow: var(--shadow-xl); opacity: 0; visibility: hidden; transform: translateX(-50%) translateY(4px); transition: all var(--duration-fast) var(--ease-out); }
.header__nav-dropdown:hover .header__nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.header__nav-dropdown-item { display: block; padding: 0.5rem 0.75rem; font-size: var(--f-small); color: var(--c-text-secondary); border-radius: var(--r-sm); transition: all var(--duration-fast); }
.header__nav-dropdown-item:hover { background: var(--c-bg-alt); color: var(--c-primary); }
.header__cta { display: flex; align-items: center; gap: var(--s-md); }
.header__phone { font-size: var(--f-small); font-weight: 600; color: var(--c-text); display: flex; align-items: center; gap: var(--s-xs); }

.header__mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; width: 40px; }
.header__mobile-toggle span { display: block; width: 100%; height: 2px; background: var(--c-text); border-radius: 1px; transition: all var(--duration-normal) var(--ease-out); }
.header__mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.header__mobile-toggle.active span:nth-child(2) { opacity: 0; }
.header__mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.mobile-nav { display: none; position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0; background: var(--c-bg); z-index: 999; padding: var(--s-xl); overflow-y: auto; transform: translateX(100%); transition: transform var(--duration-slow) var(--ease-out); }
.mobile-nav.open { transform: translateX(0); }
.mobile-nav__link { display: block; padding: var(--s-md) 0; font-size: var(--f-h4); font-weight: 600; color: var(--c-text); border-bottom: 1px solid var(--c-border-light); }
.mobile-nav__sub { padding-left: var(--s-lg); }
.mobile-nav__sub a { display: block; padding: var(--s-sm) 0; font-size: var(--f-body); color: var(--c-text-secondary); }

/* --- Hero --- */
.hero { padding-top: calc(var(--header-height) + var(--s-4xl)); padding-bottom: var(--s-4xl); position: relative; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: -1; }
.hero__bg-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(0,85,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,85,255,0.03) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 70%); }
.hero__bg-glow { position: absolute; width: 600px; height: 600px; border-radius: 50%; filter: blur(120px); opacity: 0.15; }
.hero__bg-glow--1 { top: -200px; right: -100px; background: var(--c-primary); }
.hero__bg-glow--2 { bottom: -200px; left: -100px; background: var(--c-accent); opacity: 0.1; }
.hero__content { max-width: 560px; }
.hero__badge { display: inline-flex; align-items: center; gap: var(--s-sm); padding: 0.4rem 1rem; background: var(--c-primary-light); color: var(--c-primary); font-size: var(--f-caption); font-weight: 600; border-radius: var(--r-full); margin-bottom: var(--s-xl); }
.hero__badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--c-primary); animation: pulse-dot 2s ease infinite; }
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero__title { margin-bottom: var(--s-lg); }
.hero__desc { font-size: 1.15rem; color: var(--c-text-secondary); line-height: 1.8; margin-bottom: var(--s-2xl); max-width: 560px; }
.hero__actions { display: flex; align-items: center; gap: var(--s-lg); flex-wrap: wrap; }

/* Hero layout: left content + right visual */
.hero__row { display:flex;align-items:center;gap:var(--s-4xl) }

/* Hero visual (right-side SVG) */
.hero__visual { flex-shrink:0;width:380px;max-width:38vw }
.hero__stats { display: flex; gap: var(--s-3xl); margin-top: var(--s-4xl); padding-top: var(--s-2xl); border-top: 1px solid var(--c-border); }
.hero__stat-value { font-size: var(--f-h2); font-weight: 700; color: var(--c-text); line-height: 1; }
.hero__stat-value span { color: var(--c-primary); }
.hero__stat-label { font-size: var(--f-small); color: var(--c-text-muted); margin-top: var(--s-xs); }

/* --- Section --- */
.section { padding: var(--s-4xl) 0; }
.section--alt { background: var(--c-bg-alt); }
.section--dark { background: var(--c-bg-dark); color: var(--c-text-inverse); }
.section--dark .section-label { color: var(--c-accent); }
.section--dark .section-label::before { background: var(--c-accent); }
.section--dark .section-desc { color: var(--c-text-inverse-secondary); }
.section__header { margin-bottom: var(--s-3xl); }
.section__header--center { text-align: center; }
.section__header--center .section-desc { margin: 0 auto; }

/* --- Grid --- */
.grid { display: grid; gap: var(--s-xl); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* --- Solution Card --- */
.solution-card { position: relative; border-radius: var(--r-xl); overflow: hidden; background: var(--c-surface); border: 1px solid var(--c-border-light); transition: all var(--duration-slow) var(--ease-out); cursor: pointer; }
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: transparent; }
.solution-card__img { aspect-ratio: 16/10; overflow: hidden; position: relative; }
.solution-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--duration-slow) var(--ease-out); }
.solution-card:hover .solution-card__img img { transform: scale(1.05); }
.solution-card__img-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,15,26,0.6) 0%, transparent 50%); }
.solution-card__body { padding: var(--s-lg); }
.solution-card__tag { display: inline-block; padding: 0.25rem 0.75rem; background: var(--c-primary-light); color: var(--c-primary); font-size: var(--f-caption); font-weight: 600; border-radius: var(--r-full); margin-bottom: var(--s-md); }
.solution-card__title { font-size: var(--f-h4); font-weight: 600; margin-bottom: var(--s-sm); line-height: 1.4; }
.solution-card__desc { font-size: var(--f-small); color: var(--c-text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* --- Product Card --- */
.product-card { background: var(--c-surface); border: 1px solid var(--c-border-light); border-radius: var(--r-xl); overflow: hidden; transition: all var(--duration-normal) var(--ease-out); cursor: pointer; }
.product-card:hover { border-color: var(--c-primary); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.product-card__img { aspect-ratio: 4/3; background: var(--c-bg-alt); display: flex; align-items: center; justify-content: center; padding: var(--s-xl); overflow: hidden; }
.product-card__img img { max-height: 100%; object-fit: contain; }
.product-card__body { padding: var(--s-lg); border-top: 1px solid var(--c-border-light); }
.product-card__category { font-size: var(--f-caption); color: var(--c-primary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--s-xs); }
.product-card__title { font-size: var(--f-body); font-weight: 600; margin-bottom: var(--s-xs); line-height: 1.4; }
.product-card__model { font-size: var(--f-caption); color: var(--c-text-muted); }

/* --- Feature Block --- */
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4xl); align-items: center; }
.feature-block__content { max-width: 520px; }
.feature-block__visual { position: relative; border-radius: var(--r-2xl); overflow: hidden; aspect-ratio: 4/3; }
.feature-block__visual img { width: 100%; height: 100%; object-fit: cover; }
.feature-block__list { margin-top: var(--s-xl); }
.feature-block__list-item { display: flex; align-items: flex-start; gap: var(--s-md); padding: var(--s-md) 0; }
.feature-block__list-icon { width: 40px; height: 40px; border-radius: var(--r-md); background: var(--c-primary-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--c-primary); font-size: 1.1rem; }
.feature-block__list-text h4 { font-size: var(--f-body); font-weight: 600; margin-bottom: 2px; }
.feature-block__list-text p { font-size: var(--f-small); color: var(--c-text-secondary); }

/* --- News Card --- */
.news-card { display: flex; gap: var(--s-lg); padding: var(--s-xl) 0; border-bottom: 1px solid var(--c-border-light); transition: all var(--duration-normal); }
.news-card:hover { padding-left: var(--s-md); background: var(--c-bg-alt); border-radius: var(--r-lg); }
.news-card--compact { flex-direction: column; gap: var(--s-md); border: 1px solid var(--c-border-light); border-radius: var(--r-xl); padding: 0; overflow: hidden; }
.news-card--compact .news-card__img { width: 100%; min-height: auto; aspect-ratio: 16/9; }
.news-card--compact .news-card__body { padding: var(--s-lg); }
.news-card--compact:hover { padding-left: 0; border-color: var(--c-primary); }
.news-card__img { width: 240px; min-height: 160px; flex-shrink: 0; border-radius: var(--r-lg); overflow: hidden; }
.news-card__img img { width: 100%; height: 100%; object-fit: cover; }
.news-card__body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.news-card__date { font-size: var(--f-caption); color: var(--c-text-muted); margin-bottom: var(--s-sm); }
.news-card__title { font-size: var(--f-h4); font-weight: 600; line-height: 1.5; margin-bottom: var(--s-sm); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card__title:hover { color: var(--c-primary); }
.news-card__excerpt { font-size: var(--f-small); color: var(--c-text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* --- Banner --- */
.banner { position: relative; padding: var(--s-4xl) 0; overflow: hidden; }
.banner__bg { position: absolute; inset: 0; z-index: -1; }
.banner__bg img { width: 100%; height: 100%; object-fit: cover; }
.banner__bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,85,255,0.9) 0%, rgba(0,212,170,0.8) 100%); }
.banner__content { position: relative; z-index: 1; text-align: center; color: var(--c-text-inverse); max-width: 680px; margin: 0 auto; }
.banner__title { margin-bottom: var(--s-lg); }
.banner__desc { font-size: 1.1rem; opacity: 0.85; margin-bottom: var(--s-2xl); line-height: 1.7; }

/* --- Breadcrumb --- */
.breadcrumb { padding: var(--s-xl) 0; border-bottom: 1px solid var(--c-border-light); }
.breadcrumb__list { display: flex; align-items: center; gap: var(--s-sm); font-size: var(--f-small); color: var(--c-text-muted); }
.breadcrumb__item a { color: var(--c-text-secondary); transition: color var(--duration-fast); }
.breadcrumb__item a:hover { color: var(--c-primary); }
.breadcrumb__separator { color: var(--c-text-muted); }
.breadcrumb__current { color: var(--c-text); font-weight: 500; }

/* --- Page Header --- */
.page-header { padding-top: calc(var(--header-height) + var(--s-3xl)); padding-bottom: var(--s-3xl); background: var(--c-bg-alt); position: relative; overflow: hidden; }
.page-header__bg-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(0,85,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,85,255,0.03) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse 60% 80% at 100% 50%, black 20%, transparent 70%); }
.page-header__title { margin-bottom: var(--s-md); }
.page-header__desc { color: var(--c-text-secondary); font-size: 1.1rem; max-width: 600px; }

/* --- Sidebar --- */
.content-layout { display: grid; grid-template-columns: 1fr 280px; gap: var(--s-3xl); padding: var(--s-3xl) 0; }
.sidebar__section { margin-bottom: var(--s-2xl); }
.sidebar__title { font-size: var(--f-small); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-text-muted); margin-bottom: var(--s-md); padding-bottom: var(--s-sm); border-bottom: 2px solid var(--c-primary); }
.sidebar__link { display: block; padding: var(--s-sm) 0; font-size: var(--f-small); color: var(--c-text-secondary); transition: all var(--duration-fast); }
.sidebar__link:hover, .sidebar__link.active { color: var(--c-primary); padding-left: var(--s-sm); }

/* --- Filter Tabs --- */
.filter-tabs { display: flex; gap: var(--s-sm); flex-wrap: wrap; margin-bottom: var(--s-2xl); }
.filter-tab { padding: 0.5rem 1.25rem; font-size: var(--f-small); font-weight: 500; color: var(--c-text-secondary); border: 1px solid var(--c-border); border-radius: var(--r-full); transition: all var(--duration-fast); cursor: pointer; }
.filter-tab:hover { border-color: var(--c-primary); color: var(--c-primary); }
.filter-tab.active { background: var(--c-primary); border-color: var(--c-primary); color: var(--c-text-inverse); }

/* --- Article --- */
.article { max-width: 780px; }
.article__meta { display: flex; align-items: center; gap: var(--s-lg); margin-bottom: var(--s-xl); font-size: var(--f-small); color: var(--c-text-muted); }
.article__content, .article__body { line-height: 1.8; color: var(--c-text); }
.article__content p, .article__body p { margin-bottom: var(--s-lg); }
.article__content h2, .article__body h2 { font-size: var(--f-h3); margin-top: var(--s-2xl); margin-bottom: var(--s-lg); }
.article__content h3, .article__body h3 { font-size: var(--f-h4); margin-top: var(--s-xl); margin-bottom: var(--s-md); }
.article__content img, .article__body img { border-radius: var(--r-lg); margin: var(--s-xl) 0; }
.article__content ul, .article__content ol, .article__body ul, .article__body ol { margin: var(--s-md) 0 var(--s-lg) var(--s-xl); }
.article__content li, .article__body li { margin-bottom: var(--s-sm); list-style: disc; }
.article__content blockquote, .article__body blockquote { border-left: 3px solid var(--c-primary); padding-left: var(--s-lg); margin: var(--s-xl) 0; color: var(--c-text-secondary); font-style: italic; }
.article__tag { display: inline-block; padding: 0.25rem 0.75rem; background: var(--c-primary-light); color: var(--c-primary); font-size: var(--f-caption); font-weight: 600; border-radius: var(--r-full); }
.article__cover { margin: var(--s-xl) 0; border-radius: var(--r-xl); overflow: hidden; }
.article__cover img { width: 100%; border-radius: var(--r-xl); }
.article__title { margin-bottom: var(--s-lg); }

/* --- Contact --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-3xl); }
.contact-info__item { display: flex; gap: var(--s-lg); padding: var(--s-lg) 0; border-bottom: 1px solid var(--c-border-light); }
.contact-info__icon { width: 48px; height: 48px; border-radius: var(--r-lg); background: var(--c-primary-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--c-primary); font-size: 1.2rem; }
.contact-info__label { font-size: var(--f-caption); color: var(--c-text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 2px; }
.contact-info__value { font-weight: 600; font-size: var(--f-body); }
.contact-form { background: var(--c-surface); border: 1px solid var(--c-border-light); border-radius: var(--r-2xl); padding: var(--s-2xl); }
.contact-form__title { margin-bottom: var(--s-xl); }
.form-group { margin-bottom: var(--s-lg); }
.form-label { display: block; font-size: var(--f-small); font-weight: 600; margin-bottom: var(--s-sm); color: var(--c-text); }
.form-input, .form-textarea, .form-select { width: 100%; padding: 0.75rem 1rem; border: 1.5px solid var(--c-border); border-radius: var(--r-md); font-size: var(--f-body); font-family: inherit; color: var(--c-text); background: var(--c-bg); transition: border-color var(--duration-fast); }
.form-input:focus, .form-textarea:focus, .form-select:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(0,85,255,0.1); }
.form-textarea { min-height: 120px; resize: vertical; }

/* --- Footer --- */
.footer { background: var(--c-bg-dark); color: var(--c-text-inverse); padding: var(--s-4xl) 0 var(--s-xl); }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--s-3xl); margin-bottom: var(--s-3xl); }
.footer__brand-desc { font-size: var(--f-small); color: var(--c-text-inverse-secondary); line-height: 1.7; margin: var(--s-md) 0 var(--s-lg); max-width: 320px; }
.footer__brand-contact { font-size: var(--f-small); color: var(--c-text-inverse-secondary); }
.footer__col-title { font-size: var(--f-small); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--s-lg); color: var(--c-text-inverse); }
.footer__link { display: block; padding: var(--s-xs) 0; font-size: var(--f-small); color: var(--c-text-inverse-secondary); transition: all var(--duration-fast); }
.footer__link:hover { color: var(--c-text-inverse); padding-left: var(--s-xs); }
.footer__bottom { padding-top: var(--s-xl); border-top: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: space-between; font-size: var(--f-caption); color: var(--c-text-inverse-secondary); }
.footer__bottom-links { display: flex; gap: var(--s-lg); }
.footer__bottom-links a { color: var(--c-text-inverse-secondary); transition: color var(--duration-fast); }
.footer__bottom-links a:hover { color: var(--c-accent); }

/* --- Animations --- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out); }
.reveal.revealed, .reveal.visible, .no-js .reveal { opacity: 1 !important; transform: none !important; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Scroll to Top --- */
.scroll-top { position: fixed; bottom: 2rem; right: 2rem; width: 44px; height: 44px; background: var(--c-primary); color: var(--c-text-inverse); border-radius: var(--r-md); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(8px); transition: all var(--duration-normal) var(--ease-out); z-index: 100; cursor: pointer; }
.scroll-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top:hover { background: var(--c-primary-dark); transform: translateY(-2px); }

/* --- Float Service --- */
.float-service { position: fixed; right: 1.5rem; bottom: 6rem; z-index: 100; display: flex; flex-direction: column; gap: var(--s-sm); }
.float-service__item { width: 48px; height: 48px; background: var(--c-surface); border: 1px solid var(--c-border-light); border-radius: var(--r-lg); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--c-text-secondary); cursor: pointer; transition: all var(--duration-fast); box-shadow: var(--shadow-md); position: relative; }
.float-service__item:hover { border-color: var(--c-primary); color: var(--c-primary); transform: scale(1.05); }
.float-service__tooltip { position: absolute; right: calc(100% + 8px); top: 50%; transform: translateY(-50%); background: var(--c-bg-dark); color: var(--c-text-inverse); padding: 0.4rem 0.8rem; border-radius: var(--r-md); font-size: var(--f-caption); white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity var(--duration-fast); }
.float-service__item:hover .float-service__tooltip { opacity: 1; }

/* --- Pagination --- */
.pagination { display: flex; align-items: center; justify-content: center; gap: var(--s-sm); margin-top: var(--s-3xl); }
.pagination__btn { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--c-border); border-radius: var(--r-md); font-size: var(--f-small); font-weight: 500; color: var(--c-text-secondary); transition: all var(--duration-fast); }
.pagination__btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pagination__btn.active { background: var(--c-primary); border-color: var(--c-primary); color: var(--c-text-inverse); }

/* --- Divider --- */
.divider { height: 1px; background: var(--c-border-light); margin: var(--s-2xl) 0; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .feature-block { grid-template-columns: 1fr; gap: var(--s-2xl); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  :root { --s-4xl: 4rem; --s-3xl: 3rem; }
  .header__nav, .header__cta { display: none; }
  .header__mobile-toggle { display: flex; }
  .mobile-nav { display: block; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero__stats { flex-direction: column; gap: var(--s-xl); }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .hero__row { flex-direction: column; }
  .hero__visual { max-width: 280px; margin: var(--s-xl) auto 0; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--s-2xl); }
  .footer__bottom { flex-direction: column; gap: var(--s-md); text-align: center; }
  .news-card { flex-direction: column; }
  .news-card__img { width: 100%; min-height: auto; aspect-ratio: 16/9; }
  .filter-tabs { overflow-x: auto; flex-wrap: nowrap; padding-bottom: var(--s-sm); }
  .filter-tab { flex-shrink: 0; }
}
@media (max-width: 480px) { .container { padding: 0 var(--s-md); } }

/* --- h4 utility (used extensively) --- */
.h4 { font-size: var(--f-h4); font-weight: 600; line-height: 1.4; }

/* --- Tag --- */
.tag { display:inline-block;padding:0.2rem 0.6rem;background:var(--c-bg-alt);font-size:var(--f-caption);color:var(--c-text-muted);border-radius:var(--r-sm) }

/* --- Map Container --- */
.map-container { width:100%;aspect-ratio:16/9;background:var(--c-bg-alt);border-radius:var(--r-2xl);overflow:hidden;border:1px solid var(--c-border-light) }
.map-container iframe { width:100%;height:100%;border:none }

/* --- About Hero --- */
.about-hero__content { display:grid;grid-template-columns:1fr 1fr;gap:var(--s-3xl);align-items:center }
.about-hero__visual { position:relative }
.about-hero__img { border-radius:var(--r-2xl);overflow:hidden }
.about-hero__img img { width:100%;aspect-ratio:4/3;object-fit:cover }
.about-hero__badge { position:absolute;bottom:-20px;right:-20px;width:140px;height:140px;background:var(--c-primary);border-radius:var(--r-2xl);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--c-text-inverse);transform:rotate(-6deg);box-shadow:var(--shadow-xl) }
.about-hero__badge-value { font-size:var(--f-h2);font-weight:800;line-height:1 }
.about-hero__badge-label { font-size:var(--f-caption);opacity:0.9 }
@media(max-width:768px){.about-hero__content{grid-template-columns:1fr}.about-hero__badge{bottom:-10px;right:10px;width:100px;height:100px}}

/* --- Timeline --- */
.timeline { position:relative;padding-left:var(--s-2xl) }
.timeline::before { content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--c-border) }
.timeline__item { position:relative;padding-bottom:var(--s-2xl) }
.timeline__item::before { content:'';position:absolute;left:calc(-1*var(--s-2xl) - 5px);top:6px;width:12px;height:12px;border-radius:50%;background:var(--c-primary);border:3px solid var(--c-bg);box-shadow:0 0 0 2px var(--c-primary) }
.timeline__year { font-size:var(--f-small);font-weight:700;color:var(--c-primary);margin-bottom:var(--s-xs) }
.timeline__title { font-weight:600;margin-bottom:var(--s-xs) }
.timeline__desc { font-size:var(--f-small);color:var(--c-text-secondary) }

/* --- Article Nav (prev/next) --- */
.article__nav { display:grid;grid-template-columns:1fr 1fr;gap:var(--s-lg);margin-top:var(--s-2xl);padding-top:var(--s-2xl);border-top:1px solid var(--c-border-light) }
.article__nav-link { padding:var(--s-lg);background:var(--c-bg-alt);border-radius:var(--r-lg);transition:all var(--duration-fast) }
.article__nav-link:hover { background:var(--c-primary-light) }
.article__nav-label { display:block;font-size:var(--f-caption);color:var(--c-text-muted);margin-bottom:var(--s-xs) }
.article__nav-title { font-size:var(--f-small);font-weight:600;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden }
.article__nav--next { text-align:right }
@media(max-width:768px){.article__nav{grid-template-columns:1fr}}

/* --- Article Date --- */
.article__date { font-size:var(--f-small);color:var(--c-text-muted) }

/* --- Touch-friendly dropdown --- */
@media(hover:none){
  .header__nav-dropdown-menu { display:none }
  .header__nav-dropdown.open .header__nav-dropdown-menu { display:block;opacity:1;visibility:visible;transform:translateX(-50%) translateY(0) }
}

/* --- Admin sidebar mobile --- */
@media(max-width:768px){
  .sidebar{position:relative!important;width:100%!important;height:auto!important}
  .sidebar-nav{display:flex;flex-wrap:wrap;gap:0;padding:8px 0}
  .sidebar-nav a{font-size:12px;padding:8px 12px;white-space:nowrap}
  .sidebar-nav .nav-label{display:none}
  .sidebar-brand{display:none}
  .main-content{margin-left:0!important}
  .top-header{position:static!important}
  .content-area{padding:12px!important}
}

/* Floating Contact Sidebar */
.float-contact{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:100;display:flex;flex-direction:column;gap:10px}
.float-contact__item{width:44px;height:44px;border-radius:var(--r-full);background:var(--c-bg);border:1px solid var(--c-border);display:flex;align-items:center;justify-content:center;color:var(--c-primary);cursor:pointer;transition:all var(--duration-fast);box-shadow:var(--shadow-md);text-decoration:none}
.float-contact__item:hover{background:var(--c-primary);color:var(--c-text-inverse);transform:scale(1.1);box-shadow:var(--shadow-lg)}
@media(max-width:768px){.float-contact{right:8px;gap:6px}.float-contact__item{width:36px;height:36px}}