/* ===== LOCAL FONTS: Inter ===== */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/inter-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('../fonts/inter-700.woff2') format('woff2');
}

/* ===== VARIABLES ===== */
:root {
  --navy: #071e3d;
  --navy-mid: #0d2a55;
  --navy-light: #102f60;
  --blue: #1d6fd8;
  --blue-bright: #2d8bff;
  --blue-light: #60a5fa;
  --cyan: #38bdf8;
  --gold: #f59e0b;
  --gold-light: #fbbf24;
  --white: #ffffff;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --card-bg: rgba(10,31,61,0.45);
  --card-border: rgba(45,139,255,0.15);
  --border: rgba(45,139,255,0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', 'Segoe UI', system-ui, sans-serif; background: #071e3d; color: var(--text-body); line-height: 1.6; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy); }
::-webkit-scrollbar-thumb { background: var(--blue); border-radius: 3px; }

/* ===== LAYOUT ===== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-alt { background: rgba(7,26,56,0.5); }

/* ===== SECTION HEADER ===== */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-tag {
  display: inline-block;
  background: rgba(29,111,216,0.15); border: 1px solid var(--blue);
  color: var(--blue-light); padding: 0.3rem 1rem; border-radius: 50px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 1rem;
}
.section-title { font-size: clamp(1.6rem,3vw,2.5rem); font-weight: 800; color: var(--white); margin-bottom: 0.75rem; }
.section-subtitle { color: var(--gray-400); font-size: 1rem; max-width: 700px; margin: 0 auto; }

/* ===== NAVBAR ===== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0.9rem 0; transition: var(--transition);
  background: rgba(4,18,42,0.85); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
}
#navbar.scrolled { background: rgba(4,18,42,0.98); padding: 0.6rem 0; box-shadow: 0 4px 30px rgba(0,0,0,0.4); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav-logo { display: flex; flex-direction: column; align-items: center; gap: 0.15rem; min-width: 130px; }
.nav-logo img { height: 34px; width: auto; }
.nav-logo-url { font-size: 0.62rem; color: var(--blue-light); letter-spacing: 0.04em; font-weight: 500; }
.nav-links { display: flex; align-items: center; gap: 0.15rem; flex-wrap: nowrap; }
.nav-links a { color: var(--gray-300); font-size: 0.8rem; font-weight: 500; padding: 0.4rem 0.55rem; border-radius: 6px; transition: var(--transition); white-space: nowrap; }
.nav-links a:hover { color: var(--white); background: rgba(45,139,255,0.1); }
.nav-actions { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.lang-select { background: rgba(10,31,61,0.9); border: 1px solid var(--border); color: var(--gray-300); padding: 0.35rem 0.6rem; border-radius: 6px; font-size: 0.78rem; cursor: pointer; transition: var(--transition); }
.lang-select:hover { border-color: var(--blue); }
.btn-nav-browse { background: var(--blue); color: var(--white); padding: 0.4rem 1rem; border-radius: 6px; font-size: 0.8rem; font-weight: 600; transition: var(--transition); white-space: nowrap; }
.btn-nav-browse:hover { background: var(--blue-bright); transform: translateY(-1px); }
.menu-btn { display: none; background: none; border: 1px solid var(--border); color: var(--white); padding: 0.4rem 0.6rem; border-radius: 6px; cursor: pointer; font-size: 1.2rem; }

/* ===== MOBILE MENU ===== */
#mobile-menu { display: none; position: fixed; top: 68px; left: 0; right: 0; background: rgba(4,18,42,0.98); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 1rem; z-index: 999; flex-direction: column; gap: 0.5rem; }
#mobile-menu.open { display: flex; }
#mobile-menu a { color: var(--gray-300); padding: 0.6rem 1rem; border-radius: 6px; font-size: 0.9rem; transition: var(--transition); }
#mobile-menu a:hover { color: var(--white); background: rgba(45,139,255,0.1); }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.75rem; border-radius: 8px; font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: var(--transition); border: none; }
.btn-primary { background: linear-gradient(135deg, var(--blue), var(--blue-bright)); color: var(--white); box-shadow: 0 4px 20px rgba(29,111,216,0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(29,111,216,0.6); }
.btn-outline { background: transparent; color: var(--blue-light); border: 1.5px solid var(--blue); }
.btn-outline:hover { background: rgba(29,111,216,0.15); transform: translateY(-2px); }
.btn-gold { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #020c1e; font-weight: 700; }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(245,158,11,0.5); }
.btn-lg { padding: 1rem 2.5rem; font-size: 1.05rem; }

/* ===== HERO ===== */
#hero { min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden; padding-top: 80px; }
.hero-bg { position: absolute; inset: 0; background: url('../images/hero_banner.webp') center/cover no-repeat; filter: brightness(0.45); z-index: 0; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(4,18,42,0.60) 0%, rgba(4,18,42,0.30) 60%, rgba(10,31,61,0.35) 100%); z-index: 1; }
.hero-grid-lines { position: absolute; inset: 0; background-image: linear-gradient(rgba(29,111,216,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(29,111,216,0.05) 1px, transparent 1px); background-size: 60px 60px; z-index: 2; }
#hero .container { position: relative; z-index: 3; }
.hero-content { max-width: 750px; padding: 3rem 0; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(29,111,216,0.15); border: 1px solid rgba(29,111,216,0.4); color: var(--cyan); padding: 0.4rem 1rem; border-radius: 50px; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1.5rem; }
.hero-badge::before { content: ''; width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; transform:scale(1); } 50% { opacity:0.5; transform:scale(1.5); } }
.hero-title { font-size: clamp(2.5rem,6vw,4.5rem); font-weight: 800; color: var(--white); margin-bottom: 0.75rem; background: linear-gradient(135deg, #fff, #60a5fa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: clamp(1rem,2vw,1.25rem); color: var(--blue-light); font-weight: 500; margin-bottom: 1rem; }
.hero-desc { font-size: 1rem; color: var(--gray-300); margin-bottom: 2.5rem; max-width: 600px; line-height: 1.75; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero-stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 800; color: var(--white); line-height: 1; background: linear-gradient(135deg,#fff,var(--blue-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; }
.stat-label { font-size: 0.78rem; color: var(--gray-400); margin-top: 0.25rem; }
.stat-divider { width: 1px; background: var(--border); }

/* ===== OVERVIEW ===== */
.overview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; }
.overview-text p { color: var(--gray-300); line-height: 1.8; margin-bottom: 1.25rem; }
.kv-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.5rem 0; }
.kv-tag { background: rgba(29,111,216,0.15); border: 1px solid rgba(29,111,216,0.3); color: var(--blue-light); padding: 0.3rem 0.8rem; border-radius: 50px; font-size: 0.78rem; font-weight: 600; }
.value-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
.value-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.25rem; }
.value-card-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.value-card h4 { font-size: 0.875rem; font-weight: 700; color: var(--white); margin-bottom: 0.4rem; }
.value-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0; }
.overview-image-wrap { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.overview-image-wrap img { width: 100%; height: 380px; object-fit: cover; }
.img-caption { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(4,18,42,0.9)); padding: 1.5rem 1rem 0.75rem; font-size: 0.78rem; color: var(--gray-300); text-align: center; }

/* ===== CATEGORY HIERARCHY ===== */
.cat-hierarchy { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; margin-bottom: 2.5rem; }
.cat-node { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.5rem; text-align: center; transition: var(--transition); }
.cat-node:hover { border-color: var(--blue-bright); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(29,111,216,0.2); }
.cat-node-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.cat-node h3 { font-size: 0.95rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.cat-node p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0; }

/* ===== TABS ===== */
.tabs-container { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-lg); overflow: hidden; }
.tab-buttons { display: flex; overflow-x: auto; background: rgba(0,0,0,0.2); border-bottom: 1px solid var(--card-border); }
.tab-btn { flex-shrink: 0; padding: 1rem 1.5rem; background: none; border: none; color: var(--text-muted); font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: var(--transition); border-bottom: 3px solid transparent; white-space: nowrap; }
.tab-btn:hover { color: var(--white); }
.tab-btn.active { color: var(--blue-light); border-bottom-color: var(--blue-bright); background: rgba(29,111,216,0.08); }
.tab-panel { display: none; padding: 2rem; }
.tab-panel.active { display: block; }

/* ===== PRODUCT GRID ===== */
.product-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.product-card { background: var(--navy-light); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.25rem; transition: var(--transition); }
.product-card:hover { border-color: var(--blue-bright); transform: translateY(-4px); box-shadow: var(--shadow); }
.product-card h4 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.product-card p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0.75rem; }
.product-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.product-tag { background: rgba(29,111,216,0.12); color: var(--blue-light); border: 1px solid rgba(29,111,216,0.25); padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.7rem; font-weight: 600; }

/* ===== FIBER TABLE ===== */
.fiber-table-wrap h3 { color: var(--white); font-size: 1.2rem; margin-bottom: 1.5rem; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th { background: rgba(29,111,216,0.15); color: var(--blue-light); padding: 1rem 1.25rem; text-align: left; font-size: 0.82rem; font-weight: 700; border-bottom: 2px solid rgba(29,111,216,0.3); }
.data-table td { padding: 0.875rem 1.25rem; color: var(--text-body); font-size: 0.875rem; border-bottom: 1px solid var(--card-border); }
.data-table tr:hover td { background: rgba(255,255,255,0.03); }

/* ===== INDUSTRY GRID ===== */
.industry-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.industry-card { background: var(--navy-light); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.5rem; text-align: center; transition: var(--transition); }
.industry-card:hover { border-color: var(--blue-bright); transform: translateY(-4px); }
.industry-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.industry-card h4 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.industry-card p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0; }

/* ===== SCENARIOS ===== */
.scenarios-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.scenario-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.scenario-card:hover { border-color: var(--blue-bright); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.scenario-img { width: 100%; height: 180px; object-fit: cover; }
.scenario-body { padding: 1.25rem; position: relative; }
.scenario-num { position: absolute; top: -1rem; right: 1rem; background: var(--blue); color: var(--white); width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.72rem; font-weight: 800; }
.scenario-body h3 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.scenario-body p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0.75rem; }
.scenario-link { font-size: 0.8rem; color: var(--blue-light); font-weight: 600; transition: var(--transition); }
.scenario-link:hover { color: var(--white); }

/* ===== SOLUTIONS ===== */
.solutions-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.solution-card { display: flex; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.solution-card:hover { border-color: var(--blue-bright); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.solution-img { width: 200px; height: 140px; object-fit: cover; flex-shrink: 0; }
.solution-body { padding: 1.25rem; display: flex; flex-direction: column; justify-content: space-between; }
.solution-num { font-size: 0.7rem; font-weight: 700; color: var(--blue-light); letter-spacing: 0.1em; text-transform: uppercase; }
.solution-body h3 { font-size: 0.95rem; font-weight: 700; color: var(--white); margin: 0.4rem 0; line-height: 1.4; }
.solution-body p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; margin-bottom: 0.75rem; }
.solution-link { font-size: 0.8rem; color: var(--blue-light); font-weight: 600; transition: var(--transition); }
.solution-link:hover { color: var(--white); }

/* ===== SELECTION GUIDE ===== */
.selection-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.selection-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.75rem; position: relative; }
.selection-card-num { position: absolute; top: -1rem; left: 1.5rem; background: linear-gradient(135deg, var(--blue), var(--blue-bright)); color: var(--white); width: 2.5rem; height: 2.5rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 800; }
.selection-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 1rem; margin-top: 0.5rem; }
.selection-list li { font-size: 0.875rem; color: var(--text-body); line-height: 1.7; padding: 0.3rem 0 0.3rem 1rem; border-bottom: 1px solid var(--card-border); position: relative; }
.selection-list li::before { content: '›'; position: absolute; left: 0; color: var(--blue-light); font-weight: 700; }
.selection-list li:last-child { border-bottom: none; }

/* ===== MISCONCEPTIONS ===== */
.misc-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }
.misc-card { background: rgba(239,68,68,0.05); border: 1px solid rgba(239,68,68,0.15); border-radius: var(--radius); padding: 1.25rem; }
.misc-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.misc-card h4 { font-size: 0.875rem; font-weight: 700; color: #fca5a5; margin-bottom: 0.5rem; }
.misc-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0; }

/* ===== CALCULATORS ===== */
.calc-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.calc-tab-btn { background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-muted); padding: 0.5rem 1rem; border-radius: 8px; font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: var(--transition); }
.calc-tab-btn:hover { color: var(--white); border-color: var(--blue-bright); }
.calc-tab-btn.active { background: var(--blue); color: var(--white); border-color: var(--blue); }
.calc-panel { display: none; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-lg); padding: 2rem; }
.calc-panel.active { display: block; }
.calc-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.calc-form-section h3 { font-size: 1.2rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.calc-form-section p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; line-height: 1.6; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text-muted); margin-bottom: 0.4rem; }
.form-group input, .form-group select { width: 100%; background: var(--navy-light); border: 1px solid var(--card-border); color: var(--white); padding: 0.6rem 0.875rem; border-radius: 8px; font-size: 0.875rem; outline: none; transition: var(--transition); }
.form-group input:focus, .form-group select:focus { border-color: var(--blue-bright); }
.btn-calc { background: var(--blue); color: var(--white); border: none; padding: 0.75rem 2rem; border-radius: 10px; font-size: 0.9rem; font-weight: 700; cursor: pointer; transition: var(--transition); width: 100%; margin-top: 0.5rem; }
.btn-calc:hover { background: var(--blue-bright); transform: translateY(-2px); }
.calc-result-section { background: var(--navy-light); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.5rem; min-height: 300px; display: flex; flex-direction: column; justify-content: center; }
.calc-result-placeholder { text-align: center; color: var(--text-muted); }
.calc-result-placeholder .icon { font-size: 3rem; margin-bottom: 1rem; }
.calc-result-placeholder span { font-size: 0.875rem; }
.result-title { font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 1.25rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--card-border); }
.result-item { display: flex; justify-content: space-between; align-items: center; padding: 0.6rem 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.result-item:last-child { border-bottom: none; }
.result-label { font-size: 0.82rem; color: var(--text-muted); }
.result-value { font-size: 0.95rem; font-weight: 700; color: var(--blue-light); }
.result-recommend { margin-top: 1rem; background: rgba(29,111,216,0.1); border: 1px solid rgba(29,111,216,0.3); border-radius: 8px; padding: 1rem; }
.result-recommend-title { font-size: 0.8rem; font-weight: 700; color: var(--blue-light); margin-bottom: 0.5rem; }
.result-recommend p { font-size: 0.82rem; color: var(--text-body); line-height: 1.6; margin-bottom: 0; }

/* ===== INSIGHTS ===== */
.insights-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.insight-card { background: var(--card-bg); border: 1px solid var(--card-border); border-left: 4px solid var(--blue); border-radius: var(--radius); padding: 1.75rem; transition: var(--transition); }
.insight-card:hover { border-left-color: var(--gold); transform: translateY(-4px); }
.insight-card p { font-size: 0.9rem; color: var(--text-body); line-height: 1.8; font-style: italic; margin-bottom: 0; }
.insight-card p::before { content: '"'; font-size: 2rem; color: var(--blue-light); line-height: 0; vertical-align: -0.5em; margin-right: 0.25rem; }

/* ===== ECOSYSTEM ===== */
.ecosystem-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.eco-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.75rem; }
.eco-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--white); margin-bottom: 1rem; }
.eco-list li { font-size: 0.875rem; color: var(--text-body); padding: 0.4rem 0 0.4rem 1rem; border-bottom: 1px solid var(--card-border); position: relative; }
.eco-list li::before { content: '·'; position: absolute; left: 0; color: var(--blue-light); font-weight: 700; font-size: 1.2rem; line-height: 1.5; }
.eco-list li:last-child { border-bottom: none; }

/* ===== DEMAND CTA ===== */
.demand-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; background: linear-gradient(135deg, rgba(29,111,216,0.12), rgba(45,139,255,0.05)); border: 1px solid rgba(29,111,216,0.2); border-radius: var(--radius-lg); padding: 3rem; }
.demand-text h2 { font-size: 2rem; font-weight: 800; color: var(--white); margin-bottom: 1rem; }
.demand-text p { font-size: 0.95rem; color: var(--text-body); line-height: 1.8; margin-bottom: 1.5rem; }
.demand-features { margin-bottom: 2rem; }
.demand-features li { font-size: 0.875rem; color: var(--text-body); padding: 0.4rem 0 0.4rem 1.5rem; position: relative; }
.demand-features li::before { content: '✓'; position: absolute; left: 0; color: var(--gold); font-weight: 700; }
.demand-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.demand-image img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* ===== FOOTER ===== */
footer { background: var(--navy-mid); border-top: 1px solid var(--card-border); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 3rem; margin-bottom: 3rem; }
.footer-logo { display: flex; flex-direction: column; align-items: flex-start; gap: 0.5rem; margin-bottom: 1rem; }
.footer-logo img { height: 38px; width: auto; }
.footer-logo-url { font-size: 0.78rem; color: var(--blue-light); }
.footer-tagline { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }
.footer-col h4 { font-size: 0.875rem; font-weight: 700; color: var(--white); margin-bottom: 1rem; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--blue-light); }
.footer-contact-item { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
.footer-contact-icon { font-size: 1rem; }
.footer-contact-item a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-contact-item a:hover { color: var(--blue-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 2rem; border-top: 1px solid var(--card-border); font-size: 0.78rem; color: var(--text-muted); }

/* ===== PARTNER CRM BUTTON ===== */
.btn-partner-crm {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  background: rgba(245,158,11,0.15);
  border: 1px solid rgba(245,158,11,0.4);
  color: var(--gold-light);
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
  transition: var(--transition);
}
.btn-partner-crm:hover {
  background: rgba(245,158,11,0.25);
  border-color: var(--gold);
  color: var(--gold);
}

/* ===== LANGUAGE DROPDOWN ===== */
.lang-wrap { position: relative; display: inline-block; }
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  background: rgba(10,31,61,0.9);
  border: 1px solid var(--border);
  color: var(--gray-300);
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  font-family: inherit;
}
.lang-btn:hover { border-color: var(--blue); color: var(--white); }
.lang-btn .lang-arrow { font-size: 0.6rem; transition: transform 0.2s; }
.lang-wrap.open .lang-btn .lang-arrow { transform: rotate(180deg); }
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 160px;
  background: rgba(4,18,42,0.98);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  display: none;
  z-index: 9999;
  overflow: hidden;
  backdrop-filter: blur(20px);
}
.lang-wrap.open .lang-menu { display: block; }
.lang-option {
  display: block;
  width: 100%;
  padding: 0.55rem 1rem;
  background: none;
  border: none;
  color: var(--gray-300);
  font-size: 0.8rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  border-bottom: 1px solid rgba(45,139,255,0.08);
}
.lang-option:last-child { border-bottom: none; }
.lang-option:hover, .lang-option.active { background: rgba(29,111,216,0.15); color: var(--white); }

/* ===== FOOTER SOCIAL ICONS ===== */
.footer-social { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(29,111,216,0.15);
  border: 1px solid rgba(29,111,216,0.3);
  color: var(--blue-light);
  font-size: 0.7rem;
  font-weight: 800;
  transition: var(--transition);
  text-decoration: none;
}
.footer-social a:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
  transform: translateY(-2px);
}
.footer-social svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ===== SCENARIO PAGE FOOTER (unified) ===== */
.footer {
  background: var(--navy-mid);
  border-top: 1px solid var(--card-border);
  padding: 2.5rem 0 1.5rem;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand img { height: 34px; width: auto; margin-bottom: 0.5rem; }
.footer-domain { font-size: 0.75rem; color: var(--blue-light); display: block; margin-bottom: 0.5rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-links a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--blue-light); }
.footer-solutions { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-solutions strong { font-size: 0.875rem; color: var(--white); margin-bottom: 0.5rem; display: block; }
.footer-solutions a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-solutions a:hover { color: var(--blue-light); }
.footer-contact { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-contact strong { font-size: 0.875rem; color: var(--white); margin-bottom: 0.5rem; display: block; }
.footer-contact a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-contact a:hover { color: var(--blue-light); }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}
@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ===== ANIMATIONS ===== */
.slide-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.slide-left { opacity: 0; transform: translateX(-30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.slide-right { opacity: 0; transform: translateX(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.slide-up.visible, .slide-left.visible, .slide-right.visible { opacity: 1; transform: none; }

/* ===== SOLUTION PAGE ===== */
.solution-page-header { padding: 120px 0 60px; background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%); border-bottom: 1px solid var(--card-border); }
.solution-breadcrumb { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 1rem; }
.solution-breadcrumb a { color: var(--blue-light); }
.solution-breadcrumb span { margin: 0 0.5rem; }
.solution-page-title { font-size: clamp(1.75rem,4vw,2.5rem); font-weight: 800; color: var(--white); margin-bottom: 1rem; }
.solution-page-subtitle { font-size: 1rem; color: var(--text-muted); max-width: 600px; line-height: 1.7; }
.solution-hero-img { width: 100%; height: 350px; object-fit: cover; border-radius: var(--radius-lg); margin-bottom: 3rem; }
.solution-section { margin-bottom: 3rem; }
.solution-section h2 { font-size: 1.5rem; font-weight: 700; color: var(--white); margin-bottom: 1.25rem; padding-bottom: 0.75rem; border-bottom: 2px solid var(--blue); }
.solution-section h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-light); margin-bottom: 0.75rem; }
.solution-section p { font-size: 0.9rem; color: var(--text-body); line-height: 1.8; margin-bottom: 1rem; }
.solution-section ul { padding-left: 0; }
.solution-section ul li { font-size: 0.875rem; color: var(--text-body); padding: 0.4rem 0 0.4rem 1.5rem; position: relative; border-bottom: 1px solid var(--card-border); }
.solution-section ul li::before { content: '›'; position: absolute; left: 0; color: var(--blue-light); font-weight: 700; font-size: 1.1rem; }
.solution-section ul li:last-child { border-bottom: none; }
.solution-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.solution-spec-table { width: 100%; border-collapse: collapse; }
.solution-spec-table th { background: rgba(29,111,216,0.15); color: var(--blue-light); padding: 0.875rem 1rem; text-align: left; font-size: 0.8rem; font-weight: 700; border-bottom: 2px solid rgba(29,111,216,0.3); }
.solution-spec-table td { padding: 0.75rem 1rem; font-size: 0.875rem; color: var(--text-body); border-bottom: 1px solid var(--card-border); }
.solution-spec-table tr:hover td { background: rgba(255,255,255,0.03); }
.solution-cta { background: linear-gradient(135deg, rgba(29,111,216,0.15), rgba(45,139,255,0.08)); border: 1px solid rgba(29,111,216,0.3); border-radius: var(--radius-lg); padding: 2.5rem; text-align: center; margin-top: 3rem; }
.solution-cta h3 { font-size: 1.5rem; font-weight: 700; color: var(--white); margin-bottom: 0.75rem; }
.solution-cta p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.solution-cta-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.solution-nav-btns { display: flex; justify-content: space-between; align-items: center; padding: 2rem 0; border-top: 1px solid var(--card-border); margin-top: 3rem; }
.solution-nav-btn { font-size: 0.875rem; color: var(--blue-light); font-weight: 600; transition: var(--transition); }
.solution-nav-btn:hover { color: var(--white); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .cat-hierarchy { grid-template-columns: repeat(2,1fr); }
  .product-grid { grid-template-columns: repeat(2,1fr); }
  .scenarios-grid { grid-template-columns: repeat(2,1fr); }
  .solutions-grid { grid-template-columns: 1fr; }
  .misc-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .btn-nav-browse { display: none; }
  .menu-btn { display: block; }
  .overview-grid { grid-template-columns: 1fr; }
  .value-cards { grid-template-columns: 1fr; }
  .cat-hierarchy { grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .selection-grid { grid-template-columns: 1fr; }
  .misc-grid { grid-template-columns: 1fr; }
  .calc-layout { grid-template-columns: 1fr; }
  .insights-grid { grid-template-columns: 1fr; }
  .ecosystem-grid { grid-template-columns: 1fr; }
  .demand-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .hero-stats { flex-direction: column; gap: 1.5rem; }
  .stat-divider { width: 60px; height: 1px; }
  .solution-card { flex-direction: column; }
  .solution-img { width: 100%; height: 160px; }
  .solution-grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .section { padding: 3.5rem 0; }
  .cat-hierarchy { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
}

/* ===== CALCULATOR INDEX GRID ===== */
.calc-index-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.calc-index-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12); border-radius: 16px; padding: 1.75rem 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; transition: var(--transition); }
.calc-index-card:hover { border-color: var(--blue-bright); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(29,111,216,0.25); }
.calc-index-icon { font-size: 2rem; line-height: 1; }
.calc-index-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--white); margin: 0; }
.calc-index-card p { font-size: 0.875rem; color: var(--text-muted); margin: 0; }
.calc-index-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.calc-index-tags span { background: rgba(29,111,216,0.2); color: #93c5fd; font-size: 0.75rem; padding: 0.2rem 0.6rem; border-radius: 20px; font-weight: 500; }

/* ===== HIGH-CONTRAST CTA: Open Calculator button ===== */
.btn-calc-enter {
  display: block;
  width: 100%;
  margin-top: auto;
  padding: 0.9rem 1.25rem;
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: #000 !important;
  font-size: 1rem;
  font-weight: 800;
  text-align: center;
  border-radius: 10px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: var(--transition);
  box-shadow: 0 4px 18px rgba(245,158,11,0.5);
  border: none;
}
.btn-calc-enter:hover {
  background: linear-gradient(135deg, #fbbf24, #fb923c);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245,158,11,0.7);
  color: #000 !important;
}

/* ===== HIGH-CONTRAST CTA: Selection Guide button ===== */
.btn-sg-enter {
  display: inline-block;
  padding: 1rem 2.75rem;
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: #000 !important;
  font-size: 1.05rem;
  font-weight: 800;
  border-radius: 12px;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(245,158,11,0.55);
}
.btn-sg-enter:hover {
  background: linear-gradient(135deg, #fbbf24, #fb923c);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(245,158,11,0.75);
  color: #000 !important;
}
.sg-cta-wrap { margin-top: 2.5rem; text-align: center; }

@media (max-width: 768px) {
  .calc-index-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .calc-index-grid { grid-template-columns: 1fr; }
}