/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; height: auto; }
input, button, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; padding: 0; }
[hidden] { display: none !important; }
a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Variables ===== */
:root {
  --navy: #0A1F44;
  --navy-deep: #071530;
  --navy-soft: #1B3A6B;
  --orange: #FF6B35;
  --orange-soft: #FF8A5C;
  --light: #F5F7FA;
  --mid: #D0D7E2;
  --dark: #1A1A1A;
  --white: #FFFFFF;
  --grad-brand: linear-gradient(135deg, #0A1F44 0%, #FF6B35 100%);
  --grad-navy: linear-gradient(180deg, #0A1F44 0%, #071530 100%);
  --font-head: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", "Helvetica Neue", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container: 1200px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 30px rgba(10, 31, 68, 0.1);
  --shadow-float: 0 18px 44px rgba(10, 31, 68, 0.16);
  --transition: 0.26s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ===== Base Typography ===== */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--dark);
  background: var(--white);
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--navy);
}
h1 { font-size: clamp(2.2rem, 4.5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.3rem; }
p { line-height: 1.8; }
strong { font-weight: 700; }

/* ===== Focus Visible ===== */
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; border-radius: 4px; }

/* ===== Container ===== */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: clamp(16px, 4vw, 32px); }

/* ===== Skip Link & Scroll Progress ===== */
.skip-link {
  position: fixed; top: 0; left: 0; z-index: 10000;
  transform: translateY(-160%);
  background: var(--orange); color: var(--white);
  font-family: var(--font-head); font-size: 0.9rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 10px 20px; border-radius: 0 0 10px 0;
  box-shadow: var(--shadow-float);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); color: var(--white); text-decoration: none; }
.scroll-progress { position: fixed; top: 0; left: 0; z-index: 9990; width: 100%; height: 4px; pointer-events: none; }
.scroll-progress-bar { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--orange) 0%, var(--orange-soft) 80%); box-shadow: 0 0 12px rgba(255, 107, 53, 0.5); }

/* ===== Header ===== */
.site-header { position: relative; background: var(--navy); color: var(--white); }
.header-ribbon {
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--orange) 0 12px, #ff8a5c 12px 14px, var(--navy-soft) 14px 26px, #234476 26px 28px);
}
.header-top { background: var(--navy-deep); border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.header-top-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 18px;
  min-height: 36px; padding-block: 8px;
}
.header-trust { margin: 0; font-size: 0.78rem; letter-spacing: 0.1em; color: rgba(255, 255, 255, 0.66); }
.header-trust::before {
  content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px;
  border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.18);
  vertical-align: 1px;
}
.header-mail { margin: 0; display: inline-flex; align-items: center; gap: 7px; font-size: 0.78rem; letter-spacing: 0.02em; color: rgba(255, 255, 255, 0.75); }
.header-mail-label {
  border: 1px solid rgba(255, 107, 53, 0.5); background: rgba(255, 107, 53, 0.12);
  color: var(--orange-soft); border-radius: 3px; padding: 1px 6px;
  font-family: var(--font-head); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em;
}

.masthead {
  position: relative; overflow: hidden;
  background: linear-gradient(125deg, rgba(255, 107, 53, 0.12) 0%, transparent 48%), var(--navy);
  border-bottom: 3px solid var(--navy-soft);
}
.masthead::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}
.masthead::after {
  content: ""; position: absolute; right: 0; top: 0; width: 30%; height: 100%;
  background: linear-gradient(135deg, transparent 44%, rgba(255, 107, 53, 0.18) 100%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
}
.masthead-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px;
  min-height: clamp(84px, 13vw, 120px); padding-block: 18px;
}

.brand { display: inline-flex; align-items: center; gap: 14px; color: var(--white); }
.brand:hover { color: var(--white); text-decoration: none; }
.brand-badge {
  display: grid; place-items: center; width: 42px; height: 42px; flex: none;
  background: linear-gradient(135deg, var(--orange) 0%, #ff7f50 100%);
  color: var(--white); font-family: var(--font-head); font-weight: 900; font-size: 1.5rem;
  clip-path: polygon(0 0, 74% 0, 100% 26%, 100% 100%, 26% 100%, 0 74%);
}
.brand-name { font-family: var(--font-head); font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 900; line-height: 1; letter-spacing: 0.04em; white-space: nowrap; }
.brand-divider { width: 1px; height: 32px; background: rgba(255, 255, 255, 0.24); }
.brand-tagline { font-family: var(--font-head); font-size: 0.72rem; line-height: 1.5; letter-spacing: 0.14em; color: var(--orange-soft); font-weight: 600; max-width: 9em; }

.masthead-edition { display: flex; align-items: center; gap: 8px; }
.masthead-edition::before { content: ""; width: 3px; height: 22px; background: var(--orange); transform: skewX(-18deg); border-radius: 1px; }
.masthead-edition-item {
  border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.04);
  border-radius: 4px; padding: 5px 10px;
  font-family: var(--font-head); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; color: rgba(255, 255, 255, 0.85);
}

.site-nav { position: relative; z-index: 100; background: var(--navy-deep); border-top: 1px solid rgba(255, 255, 255, 0.06); border-bottom: 2px solid var(--orange); }
.site-nav-inner { display: flex; align-items: center; justify-content: center; min-height: 48px; }
.nav-list { display: flex; align-items: stretch; gap: 2px; }
.nav-item { position: relative; display: flex; align-items: stretch; }
.nav-link {
  display: flex; align-items: center; gap: 6px; padding: 13px 17px;
  color: rgba(255, 255, 255, 0.82); font-family: var(--font-head); font-size: 1rem; font-weight: 700;
  letter-spacing: 0.05em; text-transform: uppercase; white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover { color: var(--white); background: rgba(255, 255, 255, 0.06); text-decoration: none; }
.nav-link-index { font-family: var(--font-head); font-size: 0.64rem; color: var(--orange); letter-spacing: 0; font-weight: 600; }
.nav-link[aria-current="page"] { color: var(--white); background: linear-gradient(180deg, rgba(255, 107, 53, 0.16) 0%, transparent 100%); }
.nav-link[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: -2px; height: 3px;
  background: var(--orange); box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

.nav-toggle { display: none; }

/* ===== Footer ===== */
.site-footer { position: relative; background: var(--navy-deep); color: rgba(255, 255, 255, 0.75); }
.site-footer::before { content: ""; display: block; height: 4px; background: linear-gradient(90deg, var(--navy) 0%, var(--orange) 50%, var(--navy) 100%); }
.footer-top { display: grid; grid-template-columns: 2.2fr 1.4fr 1fr 1.4fr; gap: clamp(28px, 4vw, 56px); padding-block: 52px 44px; align-items: start; }

.footer-brand-link { display: inline-flex; align-items: center; gap: 10px; color: var(--white); margin-bottom: 14px; }
.footer-brand-link:hover { color: var(--white); text-decoration: none; }
.footer-brand-badge {
  display: grid; place-items: center; width: 38px; height: 38px;
  background: var(--grad-brand); color: var(--white);
  font-family: var(--font-head); font-size: 1.25rem; font-weight: 900;
  clip-path: polygon(0 0, 74% 0, 100% 26%, 100% 100%, 26% 100%, 0 74%);
}
.footer-brand-name { font-family: var(--font-head); font-size: 1.5rem; font-weight: 900; letter-spacing: 0.04em; }
.footer-trust { margin-top: 10px; font-size: 0.9rem; line-height: 1.75; color: rgba(255, 255, 255, 0.62); max-width: 30em; }
.footer-cert-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.footer-cert-item {
  border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 30px; padding: 4px 12px;
  font-family: var(--font-head); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; color: rgba(255, 255, 255, 0.8);
}

.footer-title {
  margin: 0 0 16px; font-size: 0.82rem; letter-spacing: 0.2em; color: var(--orange);
  padding-bottom: 8px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); display: inline-block;
}
.footer-address { font-style: normal; display: grid; gap: 8px; }
.footer-contact-line { display: flex; gap: 10px; margin: 0; font-size: 0.9rem; line-height: 1.6; }
.footer-contact-label {
  flex: none; font-family: var(--font-head); font-size: 0.76rem; font-weight: 700; letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45); min-width: 34px; border-right: 1px solid rgba(255, 255, 255, 0.15); padding-right: 8px;
}
.footer-link-list { display: grid; gap: 7px; }
.footer-link { display: inline-flex; align-items: center; gap: 8px; color: rgba(255, 255, 255, 0.75); font-size: 0.9rem; transition: color 0.2s ease; }
.footer-link::before { content: ""; width: 5px; height: 5px; flex: none; border: 1px solid var(--orange); transform: rotate(45deg); transition: background 0.2s ease; }
.footer-link:hover { color: var(--orange); text-decoration: none; }
.footer-link:hover::before { background: var(--orange); }
.footer-note { margin: 18px 0 0; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, 0.1); font-size: 0.8rem; line-height: 1.7; color: rgba(255, 255, 255, 0.5); }

.footer-bottom { background: #050d1e; border-top: 1px solid rgba(255, 255, 255, 0.07); }
.footer-bottom-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 20px; padding-block: 14px; }
.footer-copy, .footer-icp { margin: 0; font-size: 0.8rem; color: rgba(255, 255, 255, 0.5); }
.footer-icp { letter-spacing: 0.04em; }

/* ===== Buttons ===== */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: var(--radius-sm); border: 2px solid transparent;
  font-family: var(--font-head); font-size: 0.95rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase;
  line-height: 1.2; cursor: pointer; text-align: center;
  transition: background 0.22s ease, color 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--orange); color: var(--white); box-shadow: 0 8px 20px rgba(255, 107, 53, 0.24); }
.btn-primary:hover { background: #e85a28; box-shadow: 0 12px 28px rgba(255, 107, 53, 0.34); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-secondary:hover { background: var(--navy); color: var(--white); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255, 255, 255, 0.55); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--white); transform: translateY(-2px); }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; }
.btn[disabled] { opacity: 0.55; pointer-events: none; box-shadow: none; transform: none; }

/* ===== Breadcrumb ===== */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 6px 10px; margin: 0 0 18px; font-size: 0.8rem; }
.breadcrumb-item { display: inline-flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, 0.62); }
.breadcrumb-item + .breadcrumb-item::before { content: "/"; color: rgba(255, 255, 255, 0.35); }
.breadcrumb-link { color: var(--orange-soft); }
.breadcrumb-link:hover { color: var(--orange); text-decoration: underline; }
.breadcrumb-item[aria-current="page"] { color: var(--white); }

/* ===== Sections ===== */
.section { padding-block: clamp(44px, 7vw, 88px); }
.section-dark { background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%); color: var(--white); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--white); }
.section-light { background: var(--light); }
.section-head { margin-bottom: clamp(24px, 3vw, 40px); }
.section-head-row { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px 24px; margin-bottom: 24px; }
.section-label { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 12px; font-family: var(--font-head); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase; color: var(--orange); }
.section-label::before { content: ""; width: 26px; height: 2px; background: var(--orange); }
.section-dark .section-label { color: var(--orange-soft); }
.section-title { margin-bottom: 12px; letter-spacing: 0.01em; }
.section-lead { max-width: 58em; font-size: 1.05rem; line-height: 1.8; }
.section-dark .section-lead { color: rgba(255, 255, 255, 0.7); }

/* ===== Bento Grid ===== */
.bento-grid { display: grid; grid-template-columns: repeat(12, 1fr); grid-auto-flow: dense; gap: clamp(14px, 2vw, 22px); }
.bento-cell { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); }
.bento-col-3 { grid-column: span 3; }
.bento-col-4 { grid-column: span 4; }
.bento-col-5 { grid-column: span 5; }
.bento-col-6 { grid-column: span 6; }
.bento-col-7 { grid-column: span 7; }
.bento-col-8 { grid-column: span 8; }
.bento-col-9 { grid-column: span 9; }
.bento-col-12 { grid-column: span 12; }
.bento-row-2 { grid-row: span 2; }

/* ===== Cards ===== */
.card { position: relative; background: var(--white); border: 1px solid var(--mid); border-radius: var(--radius); padding: clamp(20px, 3vw, 32px); box-shadow: var(--shadow-card); }
.card:hover { box-shadow: var(--shadow-float); }
.card-dark { background: var(--navy); color: var(--white); border-color: var(--navy); }
.card-dark h2, .card-dark h3, .card-dark h4 { color: var(--white); }
.card-accent { border-top: 4px solid var(--orange); }
.card-flat { box-shadow: none; }
.card-connect { clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px)); }
.card-notch::before { content: ""; position: absolute; top: 0; right: 0; width: 0; height: 0; border-style: solid; border-width: 0 30px 30px 0; border-color: transparent var(--orange) transparent transparent; border-radius: 0 0 0 8px; }
.card-tab {
  position: absolute; top: 0; left: 0; z-index: 2;
  padding: 6px 14px 6px 16px; background: var(--navy); color: var(--white);
  font-family: var(--font-head); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  border-radius: var(--radius) 0 var(--radius) 0;
}
.card-accent .card-tab { background: var(--orange); color: var(--white); }
.card-with-tab { padding-top: 52px; }

/* ===== Data Numbers ===== */
.data-num { display: block; font-family: var(--font-head); font-size: clamp(2.2rem, 4vw, 3.6rem); font-weight: 900; line-height: 1; letter-spacing: 0.01em; color: var(--navy); font-variant-numeric: tabular-nums; }
.data-num[data-accent="true"] { color: var(--orange); }
.data-num[data-dark="true"] { color: var(--white); }
.data-label { display: inline-block; margin-top: 6px; font-family: var(--font-head); font-size: 0.76rem; font-weight: 700; letter-spacing: 0.14em; color: rgba(26, 26, 26, 0.55); text-transform: uppercase; }
.card-dark .data-label, .section-dark .data-label { color: rgba(255, 255, 255, 0.55); }

/* ===== Media Frame ===== */
.media-frame { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--mid); aspect-ratio: 16 / 9; }
.media-frame img, .media-frame svg { width: 100%; height: 100%; object-fit: cover; }
.media-frame[data-ratio="4/3"] { aspect-ratio: 4 / 3; }
.media-frame[data-ratio="1/1"] { aspect-ratio: 1 / 1; }
.media-frame[data-ratio="21/9"] { aspect-ratio: 21 / 9; }
.media-frame[data-tone="navy"] { background: var(--navy-soft); }
.media-frame[data-tone="graph"] {
  background-color: var(--navy-soft);
  background-image: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 10px),
                    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 10px);
}
.media-frame[data-tone="grid"] {
  background-color: var(--light);
  background-image: linear-gradient(var(--mid) 1px, transparent 1px),
                    linear-gradient(90deg, var(--mid) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* ===== Tags ===== */
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 40px; background: var(--light); border: 1px solid var(--mid); color: var(--dark); font-size: 0.76rem; font-weight: 600; line-height: 1.5; }
.tag-accent { background: rgba(255, 107, 53, 0.1); border-color: rgba(255, 107, 53, 0.35); color: #c44a1e; }
.tag-navy { background: var(--navy); border-color: var(--navy); color: rgba(255, 255, 255, 0.9); }

/* ===== Filter ===== */
.filter-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 26px; }
.filter-chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 16px; border-radius: 40px;
  border: 2px solid var(--navy); background: transparent; color: var(--navy);
  font-family: var(--font-head); font-size: 0.85rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer; transition: border-color 0.22s ease, background 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
}
.filter-chip:hover { border-color: var(--orange); color: var(--orange); }
.filter-chip[data-active="true"], .filter-chip.is-active { background: var(--navy); border-color: var(--navy); color: var(--white); box-shadow: 0 6px 16px rgba(10, 31, 68, 0.24); }
.filter-chip[data-active="true"]::before { content: "✓"; font-size: 0.7rem; }

/* ===== Timeline ===== */
.timeline { position: relative; margin: 18px 0 0; }
.timeline-item { position: relative; padding: 0 0 26px 28px; border-left: 2px solid var(--mid); margin-left: 6px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ""; position: absolute; left: -7px; top: 3px; width: 12px; height: 12px; border-radius: 50%; background: var(--orange); border: 2px solid var(--navy); }
.timeline-date { display: block; font-family: var(--font-head); font-size: 0.84rem; font-weight: 700; letter-spacing: 0.1em; color: var(--orange); text-transform: uppercase; }
.timeline-title { display: block; margin: 4px 0 6px; font-family: var(--font-head); font-size: 1.14rem; font-weight: 800; color: var(--navy); }
.timeline-copy { margin: 0; font-size: 0.9rem; color: rgba(26, 26, 26, 0.68); }

/* ===== Page Hero ===== */
.page-hero { position: relative; overflow: hidden; background: linear-gradient(140deg, var(--navy) 0%, var(--navy-soft) 100%); color: var(--white); padding-block: clamp(48px, 8vw, 96px) clamp(36px, 6vw, 64px); }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px); background-size: 24px 24px; }
.page-hero::after { content: ""; position: absolute; right: -8%; bottom: -35%; width: 55%; height: 80%; background: linear-gradient(135deg, transparent 42%, rgba(255, 107, 53, 0.16) 100%); clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%); }
.page-hero-inner { position: relative; z-index: 1; }
.page-hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 14px; font-family: var(--font-head); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.22em; color: var(--orange-soft); text-transform: uppercase; }
.page-hero-eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--orange); }
.page-hero-title { color: var(--white); font-size: clamp(2.1rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: 0.01em; margin-bottom: 14px; max-width: 12em; }
.page-hero-lead { color: rgba(255, 255, 255, 0.72); font-size: 1.05rem; max-width: 46em; line-height: 1.85; }
.page-hero-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 20px; }

/* ===== Reveal Animation ===== */
.has-js-anim [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
.has-js-anim [data-revealed="true"] { opacity: 1; transform: none; }

/* ===== Back to Top ===== */
.btn-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 900;
  display: grid; place-items: center; width: 46px; height: 46px;
  border-radius: var(--radius-sm); border: 2px solid var(--navy);
  background: rgba(255, 255, 255, 0.92); color: var(--navy);
  font-family: var(--font-head); font-size: 1.1rem; font-weight: 800; line-height: 1;
  box-shadow: var(--shadow-float); cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn-top[data-visible="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
.btn-top:hover { background: var(--orange); border-color: var(--orange); color: var(--white); text-decoration: none; }

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .bento-grid { grid-template-columns: repeat(6, 1fr); }
  .bento-col-12 { grid-column: span 6; }
  .bento-col-3, .bento-col-4, .bento-col-5, .bento-col-6, .bento-col-7, .bento-col-8, .bento-col-9 { grid-column: span 3; }
  .bento-row-2 { grid-row: span 2; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 920px) {
  .site-nav-inner { justify-content: space-between; min-height: 52px; }
  .nav-toggle {
    display: inline-flex; align-items: center; gap: 9px; padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.28); border-radius: 6px;
    background: rgba(255, 255, 255, 0.04); color: var(--white);
    font-family: var(--font-head); font-size: 0.82rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase;
    transition: border-color 0.2s ease;
  }
  .nav-toggle:hover { border-color: var(--orange); }
  .nav-toggle-box { display: inline-flex; flex-direction: column; gap: 4px; width: 18px; }
  .nav-toggle-line { display: block; width: 18px; height: 2px; background: var(--orange); transform-origin: center; transition: transform 0.28s ease, opacity 0.2s ease; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .nav-toggle-label { font-size: 0.8rem; }

  .nav-list {
    display: none; position: absolute; top: 100%; left: 0; right: 0; z-index: 200;
    flex-direction: column; background: var(--navy-deep);
    border-bottom: 3px solid var(--orange); box-shadow: 0 26px 40px rgba(0, 0, 0, 0.35);
  }
  .site-nav[data-open="true"] .nav-list { display: flex; }
  .nav-item { display: block; }
  .nav-link { padding: 13px 22px; border-top: 1px solid rgba(255, 255, 255, 0.07); }
  .nav-link-index { margin-left: auto; }
  .nav-link[aria-current="page"] { background: rgba(255, 107, 53, 0.14); box-shadow: inset 3px 0 0 var(--orange); color: var(--white); }
  .nav-link[aria-current="page"]::after { display: none; }
}

@media (max-width: 640px) {
  .header-trust { font-size: 0.7rem; letter-spacing: 0.04em; }
  .header-mail { display: none; }
  .masthead-edition { display: none; }
  .brand { gap: 10px; }
  .brand-badge { width: 36px; height: 36px; font-size: 1.3rem; }
  .brand-name { font-size: 1.6rem; }
  .brand-divider { height: 26px; }
  .brand-tagline { display: none; }
  .masthead-inner { min-height: 68px; padding-block: 12px; }
  .btn-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

@media (max-width: 560px) {
  .bento-grid { grid-template-columns: 1fr; }
  .bento-col-3, .bento-col-4, .bento-col-5, .bento-col-6, .bento-col-7, .bento-col-8, .bento-col-9, .bento-col-12 { grid-column: span 1; }
  .bento-row-2 { grid-row: span 1; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; padding-block: 40px 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .scroll-progress { display: none; }
  .has-js-anim [data-reveal] { opacity: 1; transform: none; }
}