:root { --bg: #1d1b18; --bg-deep: #12110f; --surface: #24211e; --surface-2: #2b2824; --text: #f5f1e9; --muted: #aaa198; --accent: #f5a019; --accent-2: #ffae28; --border: #3b3732; --header: 72px; --radius: 999px; --max: 1240px; --display: Impact,Haettenschweiler,"Arial Narrow Bold","Arial Narrow",sans-serif; --sans: Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body { margin: 0px; background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.65; -webkit-font-smoothing: antialiased; }

img { display: block; max-width: 100%; }

a { color: inherit; }

button, input, textarea { font: inherit; }

::selection { background: var(--accent); color: rgb(21, 17, 11); }

.skip { position: fixed; left: 1rem; top: -100px; z-index: 999; padding: 0.7rem 1rem; background: var(--accent); color: rgb(17, 17, 17); font-weight: 800; }

.skip:focus { top: 1rem; }

.container { width: min(calc(100% - 2.2rem),var(--max)); margin-inline: auto; }

.display { margin: 0px; font-family: var(--display); font-weight: 900; text-transform: uppercase; letter-spacing: 0.018em; line-height: 0.9; }

.eyebrow { display: flex; align-items: center; gap: 0.8rem; margin: 0px; color: var(--accent); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.38em; text-transform: uppercase; }

.eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--accent); }

.muted { color: var(--muted); }

em { font-style: italic; }

.site-header { position: absolute; inset: 0px 0px auto; z-index: 50; height: var(--header); }

.site-header.is-scrolled { position: fixed; background: rgba(18, 17, 15, 0.92); border-bottom: 1px solid rgba(255, 255, 255, 0.08); backdrop-filter: blur(14px); }

.header-inner { height: 100%; display: flex; align-items: center; gap: 2rem; }

.brand { display: flex; align-items: baseline; gap: 0.55rem; text-decoration: none; white-space: nowrap; }

.brand strong { font-family: var(--display); font-size: 1.18rem; letter-spacing: 0.035em; color: var(--accent); font-weight: 900; }

.brand span { font-size: 0.58rem; letter-spacing: 0.34em; text-transform: uppercase; color: var(--muted); }

.main-nav { display: flex; align-items: center; gap: 1rem; margin-left: auto; }

.main-nav > a:not(.button) { color: rgb(178, 171, 162); text-decoration: none; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; transition: 0.18s; }

.main-nav > a:not(.button):hover, .main-nav > a[aria-current="page"] { color: var(--text); }

.language-switch { display: inline-flex; align-items: center; gap: 0.35rem; color: var(--muted); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; white-space: nowrap; }

.language-switch a { color: var(--muted); text-decoration: none; }

.language-switch a:hover, .language-switch a.active { color: var(--accent); }

.language-switch .sep { opacity: 0.5; }

.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0.78rem 1.55rem; border: 1px solid var(--accent); border-radius: var(--radius); background: var(--accent); color: rgb(23, 18, 11); text-decoration: none; font-size: 0.72rem; font-weight: 900; letter-spacing: 0.12em; line-height: 1; text-transform: uppercase; transition: transform 0.18s, background 0.18s; }

.button:hover { background: var(--accent-2); transform: translateY(-1px); }

.button.ghost { background: transparent; border-color: rgba(245, 241, 233, 0.22); color: var(--text); }

.button.ghost:hover { border-color: rgba(245, 241, 233, 0.6); background: rgba(255, 255, 255, 0.04); }

.button.small { min-height: 40px; padding: 0.65rem 1.2rem; font-size: 0.66rem; }

.menu-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 0px; background: transparent; color: var(--text); padding: 10px; }

.menu-toggle span { display: block; height: 2px; background: currentcolor; margin: 5px 0px; transition: 0.2s; }

.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }

.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }

.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero { position: relative; min-height: 100svh; display: grid; align-items: center; overflow: hidden; isolation: isolate; }

.hero-image { position: absolute; inset: 0px; z-index: -3; width: 100%; height: 100%; object-fit: cover; object-position: center 30%; filter: sepia(0.18) saturate(0.84) contrast(1.05); }

.hero::before { content: ""; position: absolute; inset: 0px; z-index: -2; background: linear-gradient(90deg, rgba(12, 11, 10, 0.97) 0%, rgba(12, 11, 10, 0.82) 38%, rgba(12, 11, 10, 0.24) 72%, rgba(12, 11, 10, 0.25) 100%); }

.hero::after { content: ""; position: absolute; inset: 0px; z-index: -1; background: linear-gradient(0deg,var(--bg) 0%,rgba(29,27,24,.08) 35%,rgba(0,0,0,.18) 100%); }

.hero-inner { padding-top: calc(var(--header) + 5rem); padding-bottom: 6rem; }

.hero-title { margin-top: 1.7rem; font-size: clamp(5.5rem, 11.5vw, 10.5rem); line-height: 0.84; }

.hero-title span { display: inline-block; margin-top: 0.055em; color: var(--accent); }

.hero .eyebrow::after { content: ""; width: 34px; height: 1px; background: var(--accent); flex: 0 0 34px; }

.hero-copy { max-width: 575px; margin: 2rem 0px 0px; color: rgb(196, 189, 180); font-size: clamp(1rem, 1.6vw, 1.16rem); line-height: 1.45; }

.actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 2.1rem; }

.section { padding: clamp(5.5rem, 9vw, 8.5rem) 0px; border-top: 1px solid var(--border); }

.section.alt { background: var(--bg-deep); }

.section.soft { background: rgba(43, 40, 36, 0.38); }

.section-title { font-size: clamp(3.2rem, 6.8vw, 6.5rem); margin-top: 1rem; }

.section-title span, .accent { color: var(--accent); }

.two-col { display: grid; grid-template-columns: minmax(0px, 0.95fr) minmax(0px, 1.15fr); gap: clamp(3rem, 8vw, 7rem); align-items: center; }

.two-col.reverse .media { order: 2; }

.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); color: rgb(214, 208, 200); line-height: 1.6; }

.prose { color: var(--muted); font-size: 1.04rem; }

.prose p + p { margin-top: 1.2rem; }

.prose strong { color: var(--text); }

.media { position: relative; }

.media img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: center center; filter: sepia(0.14) saturate(0.88); }

.media .badge { position: absolute; right: -16px; bottom: -16px; background: var(--accent); color: rgb(21, 17, 11); padding: 1rem 1.25rem; text-align: center; }

.badge strong { display: block; font-family: var(--display); font-size: 2rem; line-height: 1; }

.badge span { font-size: 0.58rem; font-weight: 900; letter-spacing: 0.16em; text-transform: uppercase; }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 3.2rem; background: var(--border); border: 1px solid var(--border); }

.pillar { background: var(--bg); padding: 2.3rem; }

.pillar .num { font-family: var(--display); font-size: 4rem; line-height: 1; color: rgba(245, 160, 25, 0.28); }

.pillar h3 { margin: 1.5rem 0px 0.7rem; font-size: 1.1rem; letter-spacing: 0.06em; text-transform: uppercase; }

.pillar p { margin: 0px; color: var(--muted); }

.book-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; margin-top: 3rem; }

.book-card { border: 1px solid var(--border); background: var(--bg); padding: 1.2rem; display: flex; flex-direction: column; }

.book-cover { background: var(--surface); overflow: hidden; }

.book-cover img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; transition: transform 0.35s; }

.book-card:hover .book-cover img { transform: scale(1.02); }

.book-card h3 { margin: 1.2rem 0px 0.45rem; font-size: 1.08rem; text-transform: uppercase; }

.book-card p { margin: 0px; color: var(--muted); font-size: 0.94rem; flex: 1 1 0%; }

.book-card .text-link { margin-top: 1.25rem; }

.text-link { display: inline-flex; color: var(--accent); text-decoration: none; font-size: 0.73rem; font-weight: 900; letter-spacing: 0.12em; text-transform: uppercase; }

.text-link:hover { color: var(--accent-2); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); margin-top: 3rem; }

.stat { background: var(--surface); padding: 2rem; }

.stat strong { display: block; font-family: var(--display); font-size: 2.6rem; color: var(--accent); line-height: 1; }

.stat span { display: block; margin-top: 0.6rem; color: var(--muted); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; }

.cta { text-align: center; }

.cta .section-title { max-width: 850px; margin: 1rem auto 0px; }

.cta p { max-width: 620px; margin: 1.5rem auto 0px; color: var(--muted); }

.cta .actions { justify-content: center; }

.page-hero { position: relative; min-height: 66svh; display: grid; align-items: end; padding: calc(var(--header) + 5rem) 0 5rem; overflow: hidden; isolation: isolate; }

.page-hero.has-image { min-height: 72svh; }

.page-hero img { position: absolute; inset: 0px; z-index: -3; width: 100%; height: 100%; object-fit: cover; filter: sepia(0.18) saturate(0.82); }

.page-hero::before { content: ""; position: absolute; inset: 0px; z-index: -2; background: linear-gradient(90deg, rgba(15, 14, 12, 0.97), rgba(15, 14, 12, 0.72) 48%, rgba(15, 14, 12, 0.3)); }

.page-hero::after { content: ""; position: absolute; inset: 0px; z-index: -1; background: linear-gradient(0deg,var(--bg),transparent 58%); }

.page-title { font-size: clamp(4.5rem, 10vw, 9rem); margin-top: 1.4rem; max-width: 1000px; }

.page-intro { max-width: 720px; margin: 1.8rem 0px 0px; color: rgb(204, 197, 188); font-size: 1.15rem; }

.timeline { margin-top: 2rem; border-top: 1px solid var(--border); }

.timeline-item { display: grid; grid-template-columns: 150px 1fr; gap: 2rem; padding: 1.5rem 0px; border-bottom: 1px solid var(--border); }

.timeline-item strong { color: var(--accent); font-family: var(--display); font-size: 1.4rem; }

.timeline-item p { margin: 0px; color: var(--muted); }

.lesson-card { border: 1px solid var(--border); background: var(--surface); padding: clamp(2rem, 5vw, 4rem); }

.price { font-family: var(--display); font-size: clamp(4rem, 8vw, 7rem); line-height: 0.85; color: var(--accent); }

.price small { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; }

.checklist { display: grid; gap: 0.9rem; padding: 0px; margin: 2rem 0px; list-style: none; }

.checklist li { position: relative; padding-left: 1.7rem; color: rgb(217, 210, 201); }

.checklist li::before { content: ""; position: absolute; left: 0px; top: 0.67rem; width: 0.55rem; height: 0.55rem; background: var(--accent); border-radius: 50%; }

.contact-form { display: grid; gap: 1rem; }

.field { display: grid; gap: 0.4rem; }

.field label { font-size: 0.65rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }

.field input, .field textarea { width: 100%; border: 1px solid var(--border); background: rgb(24, 22, 19); color: var(--text); padding: 0.9rem 1rem; border-radius: 3px; outline: none; }

.field input:focus, .field textarea:focus { border-color: var(--accent); }

.field .optional { color: rgb(133, 126, 118); font-size: 0.58rem; font-weight: 600; letter-spacing: 0.08em; text-transform: none; }

.form-honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

.contact-form .button:disabled { cursor: wait; opacity: 0.68; }

.form-status { min-height: 1.5rem; margin: 0.15rem 0px 0px; font-size: 0.84rem; line-height: 1.55; }

.form-status:empty { min-height: 0px; }

.form-status.is-success { color: var(--accent); }

.form-status.is-error { color: rgb(239, 150, 137); }

.knowledge-intro { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 5rem; align-items: end; }

.search-box { position: sticky; top: 88px; z-index: 10; padding: 1rem; background: rgba(29, 27, 24, 0.96); border: 1px solid var(--border); backdrop-filter: blur(10px); }

.search-box label { display: block; margin-bottom: 0.55rem; color: var(--accent); font-size: 0.67rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; }

.search-row { display: flex; gap: 0.7rem; }

.search-row input { flex: 1 1 0%; min-width: 0px; border: 1px solid var(--border); background: rgb(20, 19, 16); color: var(--text); padding: 0.9rem 1rem; outline: none; }

.search-row input:focus { border-color: var(--accent); }

.result-count { margin: 0.65rem 0px 0px; color: var(--muted); font-size: 0.78rem; }

.tech-table-wrap { margin-top: 2rem; overflow-x: auto; border: 1px solid var(--border); }

.tech-table { width: 100%; border-collapse: collapse; min-width: 1050px; }

.tech-table th { position: sticky; top: 0px; background: rgb(22, 20, 17); color: var(--accent); text-align: left; font-size: 0.63rem; letter-spacing: 0.13em; text-transform: uppercase; padding: 0.9rem; border-bottom: 1px solid var(--border); }

.tech-table td { vertical-align: top; padding: 0.9rem; border-bottom: 1px solid var(--border); color: rgb(200, 193, 184); font-size: 0.88rem; }

.tech-table td:first-child { color: var(--text); font-weight: 800; }

.tech-table td.zh { font-size: 1.18rem; color: var(--text); white-space: nowrap; }

.tech-table tr:hover td { background: rgba(245, 160, 25, 0.035); }

.tech-empty { padding: 2rem; text-align: center; color: var(--muted); border: 1px solid var(--border); margin-top: 1rem; }

.site-footer { border-top: 1px solid var(--border); background: rgb(17, 16, 14); }

.footer-inner { display: flex; justify-content: space-between; gap: 2rem; align-items: center; padding: 2.3rem 0px; }

.footer-brand { display: flex; align-items: baseline; gap: 0.55rem; }

.footer-brand strong { font-family: var(--display); color: var(--accent); font-size: 1.05rem; }

.footer-brand span, .footer-copy { color: var(--muted); font-size: 0.62rem; letter-spacing: 0.13em; text-transform: uppercase; }

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .main-nav { position: fixed; inset: var(--header) 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0px; margin: 0px; padding: 1rem; background: rgb(21, 20, 17); border-bottom: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .main-nav > a:not(.button) { padding: 1rem; }
  .main-nav .language-switch { padding: 1rem; }
  .main-nav .button { margin: 0.6rem 1rem 1rem; }
  .header-cta { display: none; }
  .two-col, .knowledge-intro { grid-template-columns: 1fr; }
  .two-col.reverse .media { order: initial; }
  .pillars, .book-grid, .stats { grid-template-columns: 1fr; }
  .media { max-width: 580px; }
  .media .badge { right: 8px; bottom: 8px; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.4rem; }
  .hero::before { background: linear-gradient(90deg, rgba(12, 11, 10, 0.97), rgba(12, 11, 10, 0.68)); }
  .hero-title { font-size: clamp(4.6rem, 20vw, 8rem); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 1.35rem),var(--max)); }
  .hero { min-height: 760px; }
  .hero-inner { padding-top: 8rem; }
  .eyebrow { letter-spacing: 0.22em; font-size: 0.64rem; }
  .actions { flex-direction: column; align-items: stretch; }
  .actions .button { width: 100%; }
  .page-title { font-size: clamp(4rem, 18vw, 6.8rem); }
  .section { padding: 4.8rem 0px; }
  .tech-table-wrap { border: 0px; overflow: visible; }
  .tech-table { min-width: 0px; display: block; }
  .tech-table thead { display: none; }
  .tech-table tbody { display: grid; gap: 1rem; }
  .tech-table tr { display: grid; border: 1px solid var(--border); background: var(--surface); padding: 1rem; }
  .tech-table td { display: grid; grid-template-columns: 90px 1fr; gap: 0.7rem; padding: 0.5rem 0px; border: 0px; }
  .tech-table td::before { content: attr(data-label); color: var(--accent); font-size: 0.6rem; font-weight: 900; letter-spacing: 0.08em; text-transform: uppercase; }
  .tech-table td.zh { font-size: 1rem; }
  .search-row { flex-direction: column; }
  .footer-copy { line-height: 1.5; }
}

.sifu-approach-copy { margin-top: 3.25rem; }

@media (max-width: 900px) {
  .sifu-approach-copy { margin-top: 0px; }
}

.hub-card-link { display: block; text-decoration: none; }

.hub-card-link .pillar { height: 100%; transition: background 0.18s, transform 0.18s; }

.hub-card-link:hover .pillar { background: var(--surface); transform: translateY(-2px); }

.article-status { display: inline-flex; margin-top: 1rem; padding: 0.35rem 0.65rem; border: 1px solid var(--border); color: var(--muted); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }

@media (min-width: 1181px) {
  .main-nav { gap: 0.78rem; }
  .main-nav > a:not(.button), .nav-parent { color: rgb(178, 171, 162); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; white-space: nowrap; text-decoration: none !important; }
  .nav-dropdown { position: relative; display: flex; align-items: center; align-self: stretch; }
  .nav-parent { display: flex; align-items: center; height: 100%; transition: color 0.18s; }
  .nav-parent::after { content: ""; width: 5px; height: 5px; margin-left: 0.48rem; margin-top: -3px; border-right: 1.5px solid; border-bottom: 1.5px solid; transform: rotate(45deg); opacity: 0.8; }
  .nav-parent:hover { color: var(--text); }
  .nav-submenu-toggle { display: none !important; }
  .nav-submenu { position: absolute; z-index: 1000; top: calc(100% - 1px); left: 50%; display: block; width: 240px; padding: 0.38rem; background: rgb(23, 21, 18); border-right: 1px solid rgba(255, 255, 255, 0.1); border-bottom: 1px solid rgba(255, 255, 255, 0.1); border-left: 1px solid rgba(255, 255, 255, 0.1); border-image: none; border-top: 2px solid var(--accent); box-shadow: rgba(0, 0, 0, 0.38) 0px 18px 40px; opacity: 0; visibility: hidden; pointer-events: none; transform: translate(-50%, 8px); transition: opacity 0.16s, transform 0.16s, visibility 0.16s; }
  .nav-dropdown:hover > .nav-submenu, .nav-dropdown:focus-within > .nav-submenu { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0px); }
  .nav-submenu a { display: block; padding: 0.76rem 0.82rem; color: rgb(193, 185, 175); background: transparent; font-size: 0.65rem; font-weight: 800; letter-spacing: 0.1em; line-height: 1.3; text-transform: uppercase; white-space: nowrap; text-decoration: none !important; }
  .nav-submenu a + a { border-top: 1px solid rgba(255, 255, 255, 0.06); }
  .nav-submenu a:hover, .nav-submenu a[aria-current="page"] { color: var(--accent); background: rgba(245, 160, 25, 0.07); }
  .main-nav .button.small { padding: 0.62rem 0.95rem; font-size: 0.62rem; letter-spacing: 0.09em; }
}

@media (max-width: 1180px) {
  .menu-toggle { display: block; }
  .main-nav { position: fixed; inset: var(--header) 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0px; margin: 0px; padding: 1rem; background: rgb(21, 20, 17); border-bottom: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .main-nav > a:not(.button) { padding: 1rem; }
  .main-nav .language-switch { padding: 1rem; }
  .main-nav .button { margin: 0.6rem 1rem 1rem; }
  .nav-dropdown { display: grid; grid-template-columns: 1fr 48px; align-items: stretch; border-top: 1px solid rgba(255, 255, 255, 0.04); border-bottom: 1px solid rgba(255, 255, 255, 0.04); }
  .nav-parent { display: flex; align-items: center; padding: 1rem; color: rgb(178, 171, 162); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; text-decoration: none !important; }
  .nav-submenu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 100%; margin: 0px; padding: 0px; border: 0px; background: transparent; color: rgb(178, 171, 162); cursor: pointer; }
  .nav-submenu-toggle::after { content: ""; width: 7px; height: 7px; border-right: 1.5px solid; border-bottom: 1.5px solid; transform: translateY(-2px) rotate(45deg); transition: transform 0.18s; }
  .nav-dropdown.open > .nav-submenu-toggle::after { transform: translateY(2px) rotate(225deg); }
  .nav-submenu { position: static; grid-column: 1 / -1; display: none; min-width: 0px; padding: 0.25rem 0.75rem 0.8rem 1.5rem; background: rgb(17, 16, 14); border-width: 1px 0px 0px; border-style: solid none none; border-color: rgba(255, 255, 255, 0.06) currentcolor currentcolor; border-image: none; box-shadow: none; opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
  .nav-dropdown.open > .nav-submenu { display: grid; }
  .nav-submenu a { display: block; padding: 0.75rem 0.5rem; color: rgb(189, 181, 171); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.12em; line-height: 1.35; text-transform: uppercase; text-decoration: none !important; }
  .nav-submenu a:hover, .nav-submenu a[aria-current="page"] { color: var(--accent); }
}