:root { --blue: #347cf5; --sky: #6bc2ff; --ice: #eef8ff; --ink: #152a48; --muted: #647891; --line: #dcecf8; --red: #e55865; --teal: #35a8b4; --orange: #ed9c45; --shadow: 0 12px 34px rgba(69,127,180,.11); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0px; padding-bottom: 88px; color: var(--ink); background: radial-gradient(circle at 92% 2%, rgba(112, 199, 255, 0.28), transparent 24%), linear-gradient(155deg, rgb(251, 253, 255) 0px, rgb(237, 248, 255) 42%, rgb(247, 251, 255) 100%); font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
.hero { position: relative; overflow: hidden; padding: calc(25px + env(safe-area-inset-top)) 18px 30px; color: var(--ink); background: transparent; }
.hero::before { content: ""; position: absolute; right: -55px; top: -78px; width: 215px; height: 215px; border: 1px solid rgba(86, 172, 242, 0.18); border-radius: 50%; box-shadow: rgba(121, 199, 255, 0.06) 0px 0px 0px 34px, rgba(121, 199, 255, 0.035) 0px 0px 0px 68px; }
.hero::after { content: "09"; position: absolute; right: 12px; top: 38px; color: rgba(51, 132, 240, 0.12); font: 900 82px / 1 "Arial Black", Arial, sans-serif; letter-spacing: -0.12em; transform: rotateY(-12deg); }
.hero-inner { position: relative; z-index: 1; width: min(100%, 680px); margin: auto; }
.badge { display: inline-flex; padding: 5px 10px; border: 1px solid rgb(209, 232, 251); border-radius: 999px; color: rgb(61, 130, 229); background: rgba(255, 255, 255, 0.78); box-shadow: rgba(72, 139, 196, 0.08) 0px 5px 14px; font-size: 10px; font-weight: 900; }
.hero h1 { max-width: 390px; margin: 14px 0px 9px; color: var(--ink); font-size: clamp(29px, 8vw, 42px); line-height: 1.18; letter-spacing: -0.04em; }
.hero p { max-width: 470px; margin: 0px; color: rgb(112, 131, 154); font-size: 13px; line-height: 1.7; }
main { width: min(100%, 720px); margin: auto; padding: 0px 12px 26px; }
.quick-nav { position: sticky; z-index: 30; top: 0px; display: flex; gap: 8px; overflow-x: auto; margin: 0px -12px 14px; padding: 10px 14px 12px; background: rgba(243, 250, 255, 0.91); scrollbar-width: none; backdrop-filter: blur(16px); }
.quick-nav::-webkit-scrollbar { display: none; }
.quick-nav a { flex: 0 0 auto; min-width: 104px; padding: 9px 16px; border: 1px solid rgba(213, 233, 249, 0.7); border-radius: 999px; color: rgb(114, 134, 157); background: rgba(255, 255, 255, 0.8); text-align: center; text-decoration: none; font-size: 12px; font-weight: 800; }
.quick-nav a:first-child { border-color: transparent; color: rgb(255, 255, 255); background: linear-gradient(135deg,var(--sky),var(--blue)); box-shadow: rgba(52, 124, 245, 0.23) 0px 6px 14px; }
.rule-group { display: grid; gap: 12px; margin-bottom: 23px; scroll-margin-top: 68px; }
.rule-group > h2 { margin: 5px 4px 0px; color: rgb(123, 145, 170); font-size: 11px; font-weight: 900; letter-spacing: 0.11em; text-transform: uppercase; }
.card { position: relative; isolation: isolate; overflow: hidden; padding: 18px 15px 16px; border: 1px solid rgba(255, 255, 255, 0.9); border-radius: 24px; background: linear-gradient(140deg, rgba(255, 255, 255, 0.96), rgba(236, 248, 255, 0.9)); box-shadow: var(--shadow); }
.card::before { content: ""; position: absolute; z-index: -1; right: 13px; top: 67px; width: 92px; height: 25px; border-radius: 50%; background: linear-gradient(rgb(255, 255, 255) 0px, rgb(203, 215, 224) 38%, rgb(130, 150, 168) 47%, rgb(244, 247, 249) 58%, rgb(159, 175, 188) 100%); box-shadow: rgba(53, 88, 117, 0.18) 0px 9px 15px, rgb(255, 255, 255) 0px 2px 3px inset; }
.card::after { content: attr(data-visual); position: absolute; z-index: -1; right: 17px; top: 18px; width: 98px; color: rgba(55, 137, 246, 0.36); font: 900 38px / 1 "Arial Black", Arial, sans-serif; letter-spacing: -0.09em; text-align: center; text-shadow: rgba(255, 255, 255, 0.9) 0px 2px, rgba(38, 114, 208, 0.16) 0px 10px 15px; -webkit-text-stroke: 1px rgba(35, 109, 216, 0.2); transform: rotateY(-10deg); }
.card h3 { display: flex; align-items: center; max-width: calc(100% - 112px); min-height: 67px; margin: 0px 0px 13px; padding: 0px 0px 12px; border-bottom: 1px solid rgba(205, 225, 241, 0.75); color: var(--ink); font-size: 18px; line-height: 1.35; letter-spacing: -0.02em; }
.card h3 b { display: none; }
.card h4 { margin: 11px 0px 5px; color: rgb(40, 65, 95); font-size: 13px; }
.card p { margin: 7px 0px; color: var(--muted); font-size: 13px; line-height: 1.76; }
.card ul { display: grid; gap: 7px; margin: 7px 0px 0px; padding: 0px; list-style: none; }
.card li { position: relative; padding-left: 14px; color: var(--muted); font-size: 13px; line-height: 1.72; }
.card li::before { content: ""; position: absolute; left: 0px; top: 0.68em; width: 5px; height: 5px; border-radius: 50%; background: rgb(98, 170, 247); box-shadow: rgba(98, 170, 247, 0.1) 0px 0px 0px 3px; }
.notice { padding: 10px 11px; border: 1px solid rgb(216, 233, 248); border-radius: 12px; background: rgba(235, 247, 255, 0.8); font-weight: 800; color: rgb(49, 83, 115) !important; line-height: 1.62 !important; }
.danger-text { color: rgb(226, 84, 98) !important; font-weight: 800; }
.red::after { color: rgba(61, 132, 239, 0.3); }
.teal::after { color: rgba(48, 164, 189, 0.31); }
.orange::after { color: rgba(65, 142, 240, 0.31); }
footer { padding: 26px 18px 34px; border-top: 1px solid rgb(220, 235, 247); color: rgb(88, 113, 140); background: rgba(255, 255, 255, 0.62); }
footer strong, footer p { display: block; width: min(100%, 680px); margin-left: auto; margin-right: auto; }
footer strong { color: var(--ink); font-size: 14px; }
footer p { margin-top: 8px; margin-bottom: 0px; font-size: 10px; line-height: 1.7; }
.bottom-nav { position: fixed; z-index: 80; right: max(7px, -353px + 50vw); bottom: 7px; left: max(7px, -353px + 50vw); display: grid; grid-template-columns: repeat(5, 1fr); padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); border: 1px solid rgba(165, 202, 232, 0.5); border-radius: 20px; background: rgba(255, 255, 255, 0.95); box-shadow: rgba(44, 91, 132, 0.21) 0px 14px 36px; backdrop-filter: blur(18px); }
.bottom-nav a { display: flex; min-width: 0px; flex-direction: column; align-items: center; gap: 1px; color: rgb(137, 153, 170); text-decoration: none; }
.bottom-nav span { display: grid; place-items: center; width: 29px; height: 29px; border-radius: 9px; font-size: 16px; font-weight: 800; }
.bottom-nav small { font-size: 9px; font-weight: 800; }
.bottom-nav .active { color: var(--blue); }
.bottom-nav .active span { color: rgb(255, 255, 255); background: linear-gradient(135deg, rgb(106, 197, 255), rgb(53, 123, 244)); box-shadow: rgba(53, 123, 244, 0.25) 0px 5px 12px; }
@media (min-width: 760px) {
  body { padding-bottom: 105px; }
  .hero { padding-top: 40px; padding-bottom: 38px; }
  main { padding-left: 0px; padding-right: 0px; }
  .quick-nav { margin-left: 0px; margin-right: 0px; border-radius: 18px; }
  .card { padding: 22px 23px; }
  .card h3 { font-size: 20px; }
  .card p, .card li { font-size: 14px; }
  .card::after { right: 29px; }
  .card::before { right: 24px; }
}
@media (max-width: 370px) {
  main { padding-left: 9px; padding-right: 9px; }
  .quick-nav { margin-left: -9px; margin-right: -9px; }
  .card { padding: 16px 12px; border-radius: 21px; }
  .card h3 { max-width: calc(100% - 95px); font-size: 16px; }
  .card::after { right: 8px; width: 88px; font-size: 34px; }
  .card::before { right: 9px; width: 85px; }
  .card p, .card li { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
:root { --cyan-top: #2ccfed; --cyan: #2bc4ef; --sky: #2abaf0; --bright: #29a2f6; --blue: #268dfa; --blue-deep: #2476fd; --ice: #eff8ff; --line: #d5e7fc; --ink: #1a1a1a; --muted: #526579; --shadow: 0 12px 34px rgba(36,118,253,.11); }
body { color: var(--ink); background: rgb(255, 255, 255); }
.hero { background: linear-gradient(145deg,#fff 12%,var(--ice) 100%); }
.hero::before { border-color: rgba(44, 207, 237, 0.2); box-shadow: rgba(43, 196, 239, 0.07) 0px 0px 0px 34px, rgba(42, 186, 240, 0.04) 0px 0px 0px 68px; }
.hero::after { color: rgba(41, 162, 246, 0.13); }
.badge { border-color: var(--line); color: var(--blue-deep); background: rgba(255, 255, 255, 0.88); box-shadow: rgba(36, 118, 253, 0.08) 0px 5px 14px; }
.hero p { color: var(--muted); }
.quick-nav { background: rgba(239, 248, 255, 0.94); }
.quick-nav a { border-color: var(--line); color: var(--muted); background: rgba(255, 255, 255, 0.92); }
.quick-nav a:first-child { border-color: transparent; background: linear-gradient(145deg,var(--cyan-top),var(--cyan),var(--sky),var(--bright),var(--blue),var(--blue-deep)); box-shadow: rgba(36, 118, 253, 0.23) 0px 6px 14px; }
.rule-group > h2 { color: var(--blue); }
.card { border-color: var(--line); background: linear-gradient(140deg,#fff 0,var(--ice) 100%); box-shadow: var(--shadow); }
.card::after, .red::after, .teal::after, .orange::after { color: rgba(41, 162, 246, 0.42); text-shadow: rgba(255, 255, 255, 0.9) 0px 2px, rgba(36, 118, 253, 0.16) 0px 10px 15px; -webkit-text-stroke-color: rgba(36, 118, 253, 0.22); }
.card h3 { border-bottom-color: var(--line); color: var(--ink); }
.card h4 { color: var(--ink); }
.card p, .card li { color: var(--muted); }
.card li::before { background: var(--bright); box-shadow: rgba(41, 162, 246, 0.11) 0px 0px 0px 3px; }
.notice { border-color: var(--line); background: var(--ice); color: rgb(36, 70, 103) !important; }
.danger-text { color: var(--blue-deep) !important; font-weight: 900; }
footer { border-top-color: var(--line); color: var(--muted); background: var(--ice); }
.bottom-nav { border-color: var(--line); background: rgba(255, 255, 255, 0.96); box-shadow: rgba(36, 118, 253, 0.16) 0px 14px 36px; }
.bottom-nav .active { color: var(--blue-deep); }
.bottom-nav .active span { background: linear-gradient(145deg,var(--cyan-top),var(--cyan),var(--sky),var(--bright),var(--blue),var(--blue-deep)); box-shadow: rgba(36, 118, 253, 0.25) 0px 5px 12px; }
.qa-section { margin: 26px 0px 15px; scroll-margin-top: 70px; }
.qa-heading { position: relative; overflow: hidden; margin-bottom: 13px; padding: 22px 18px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(135deg,#fff,var(--ice)); box-shadow: var(--shadow); }
.qa-heading::after { content: "Q&A"; position: absolute; right: -7px; top: 23px; color: rgba(41, 162, 246, 0.14); font: 900 47px / 1 "Arial Black", Arial, sans-serif; letter-spacing: -0.08em; transform: rotateY(-10deg); }
.qa-heading span { color: var(--blue); font-size: 9px; font-weight: 900; letter-spacing: 0.16em; }
.qa-heading h2 { position: relative; z-index: 1; max-width: 310px; margin: 6px 0px; color: var(--ink); font-size: 23px; line-height: 1.3; letter-spacing: -0.03em; }
.qa-heading p { margin: 0px; color: var(--muted); font-size: 11px; }
.qa-list { display: grid; gap: 9px; }
.qa-list details { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(140deg,#fff,var(--ice)); box-shadow: rgba(36, 118, 253, 0.07) 0px 7px 20px; }
.qa-list summary { position: relative; display: flex; align-items: center; min-height: 61px; padding: 12px 43px 12px 12px; color: var(--ink); font-size: 13px; font-weight: 900; line-height: 1.55; cursor: pointer; list-style: none; }
.qa-list summary::-webkit-details-marker { display: none; }
.qa-list summary::after { content: "+"; position: absolute; right: 14px; top: 50%; display: grid; place-items: center; width: 24px; height: 24px; border-radius: 8px; color: var(--blue-deep); background: rgb(255, 255, 255); box-shadow: rgba(36, 118, 253, 0.12) 0px 4px 11px; font-size: 18px; font-weight: 500; transform: translateY(-50%); }
.qa-list details[open] summary::after { content: "−"; color: rgb(255, 255, 255); background: linear-gradient(145deg,var(--cyan-top),var(--blue-deep)); }
.qa-list summary b { display: grid; place-items: center; flex: 0 0 34px; height: 34px; margin-right: 9px; border-radius: 11px; color: rgb(255, 255, 255); background: linear-gradient(145deg,var(--cyan-top),var(--blue-deep)); box-shadow: rgba(36, 118, 253, 0.2) 0px 5px 12px; font-size: 10px; }
.qa-answer { padding: 0px 15px 15px; border-top: 1px solid var(--line); }
.qa-answer p, .qa-answer li { color: var(--muted); font-size: 13px; line-height: 1.8; }
.qa-answer p { margin: 13px 0px 0px; }
.qa-answer ul { display: grid; gap: 6px; margin: 11px 0px 0px; padding: 0px; list-style: none; }
.qa-answer li { position: relative; padding-left: 14px; }
.qa-answer li::before { content: ""; position: absolute; left: 0px; top: 0.72em; width: 5px; height: 5px; border-radius: 50%; background: var(--bright); }
.qa-flow { padding: 10px 11px; border: 1px solid var(--line); border-radius: 11px; background: rgb(255, 255, 255); font-weight: 900; color: var(--blue-deep) !important; }
@media (min-width: 760px) {
  .qa-heading { padding: 26px 23px; }
  .qa-list summary { padding-right: 54px; font-size: 14px; }
  .qa-answer { padding-right: 22px; padding-left: 22px; }
  .qa-answer p, .qa-answer li { font-size: 14px; }
}
body { font-weight: 650; }
.hero p, .card p, .card li, .qa-answer p, .qa-answer li, footer p { color: rgb(52, 75, 98); font-weight: 650; }
.hero p { font-size: 14px; font-weight: 700; }
.card p, .card li { font-size: 14px; line-height: 1.78; }
.card h3, .card h4, .rule-group > h2, .qa-heading h2, .qa-list summary { font-weight: 900; }
.card h4 { font-size: 14px; }
.notice, .danger-text, .qa-flow { font-weight: 900; }
.qa-answer p, .qa-answer li { font-size: 14px; font-weight: 700; line-height: 1.82; }
.qa-heading p, .bottom-nav small, .badge, .quick-nav a { font-weight: 800; }
footer strong { font-weight: 900; }
@media (max-width: 370px) {
  .card p, .card li, .qa-answer p, .qa-answer li { font-size: 13px; }
}
.site-directory { position: sticky; z-index: 100; top: 0px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.96); box-shadow: rgba(36, 118, 253, 0.08) 0px 6px 20px; backdrop-filter: blur(18px); }
.site-directory-inner { display: flex; align-items: center; width: min(100%, 1080px); margin: auto; padding: 10px 14px; gap: 18px; }
.site-brand { flex: 0 0 auto; color: var(--blue-deep); font-size: 17px; font-weight: 900; text-decoration: none; }
.mobile-home { display: none; }
.directory-dropdown { position: relative; margin-left: auto; }
.directory-dropdown summary { list-style: none; cursor: pointer; border: 1px solid var(--line); border-radius: 12px; background: rgb(255, 255, 255); padding: 10px 15px; color: rgb(21, 54, 84); font-size: 13px; font-weight: 900; box-shadow: rgba(36, 118, 253, 0.1) 0px 6px 18px; }
.directory-dropdown summary::-webkit-details-marker { display: none; }
.directory-dropdown summary::after { content: "⌄"; margin-left: 8px; color: var(--blue-deep); }
.directory-dropdown[open] summary::after { content: "⌃"; }
.site-directory nav { display: grid; position: absolute; z-index: 110; top: calc(100% + 9px); right: 0px; width: 176px; gap: 2px; padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, 0.98); box-shadow: rgba(36, 118, 253, 0.18) 0px 18px 45px; }
.site-directory nav a { display: inline-flex; align-items: center; min-height: 34px; padding: 7px 10px; border-radius: 9px; color: rgb(52, 75, 98); font-size: 12px; font-weight: 800; text-decoration: none; white-space: nowrap; }
.site-directory nav a:hover, .site-directory nav a.active { color: rgb(255, 255, 255); background: linear-gradient(145deg,var(--cyan-top),var(--blue-deep)); box-shadow: rgba(36, 118, 253, 0.2) 0px 5px 12px; }
@media (max-width: 620px) {
  html { scroll-padding-top: 116px; }
  .site-directory-inner { padding: 9px 11px; }
  .site-brand { font-size: 15px; }
  .site-directory nav { position: fixed; top: 59px; left: 11px; right: 11px; width: auto; }
  .site-directory nav a { font-size: 13px; }
  .quick-nav { top: 59px; }
  .rule-group, .qa-section { scroll-margin-top: 118px; }
}
.hero { perspective: 900px; }
.hero-inner { transform-style: preserve-3d; }
.hero h1 { background: linear-gradient(145deg, rgb(21, 42, 72) 12%, rgb(36, 118, 253) 58%, rgb(44, 207, 237)) text; color: transparent; filter: drop-shadow(rgba(255, 255, 255, 0.95) 0px 2px 0px) drop-shadow(rgba(36, 118, 253, 0.15) 0px 8px 13px); text-shadow: rgba(255, 255, 255, 0.8) 1px 1px 0px, rgba(73, 151, 239, 0.08) 3px 4px 0px; transform: translateZ(20px); }
.hero::after { background: linear-gradient(160deg, rgba(255, 255, 255, 0.84), rgba(94, 187, 255, 0.28)) text; color: transparent; -webkit-text-stroke: 1px rgba(41, 162, 246, 0.12); filter: drop-shadow(rgba(36, 118, 253, 0.13) 0px 10px 14px); transform: rotateY(-15deg) rotateX(6deg); }
.card { transform-style: preserve-3d; perspective: 850px; transition: transform 0.28s, box-shadow 0.28s; }
.card:nth-of-type(2n)::after { transform: rotateY(13deg) rotateX(4deg); }
.card::before { height: 29px; background: linear-gradient(rgb(255, 255, 255) 0px, rgb(220, 232, 241) 26%, rgb(143, 165, 184) 44%, rgb(248, 251, 253) 60%, rgb(169, 187, 201) 78%, rgb(237, 243, 247) 100%); border: 1px solid rgba(255, 255, 255, 0.9); box-shadow: rgba(53, 88, 117, 0.2) 0px 11px 18px, rgb(255, 255, 255) 0px 3px 4px inset, rgba(91, 116, 137, 0.24) 0px -2px 3px inset; transform: rotateX(57deg) translateZ(-2px); }
.card::after { top: 13px; background: linear-gradient(155deg, rgba(255, 255, 255, 0.95) 3%, rgba(82, 184, 255, 0.72) 34%, rgba(36, 118, 253, 0.46) 66%, rgba(210, 246, 255, 0.86)) text; color: transparent; -webkit-text-stroke: 1px rgba(36, 118, 253, 0.23); text-shadow: rgba(255, 255, 255, 0.85) 1px 1px 0px, rgba(62, 137, 229, 0.2) 3px 4px 0px, rgba(36, 118, 253, 0.16) 6px 8px 12px; filter: drop-shadow(rgba(36, 118, 253, 0.12) 0px 9px 8px); transform: rotateY(-13deg) rotateX(4deg) translateZ(18px); }
@media (hover: hover) {
  .card:hover { transform: translateY(-3px) rotateX(1deg); box-shadow: rgba(36, 118, 253, 0.16) 0px 20px 44px; }
}
@media (max-width: 620px) {
  .hero h1 { filter: drop-shadow(rgba(36, 118, 253, 0.13) 0px 5px 9px); }
  .card::after { font-size: 37px; }
  .card::before { transform: rotateX(54deg) translateZ(-2px); }
}
body { background: radial-gradient(circle at 88% 0px, rgba(44, 207, 237, 0.14), transparent 24%), linear-gradient(rgb(255, 255, 255) 0px, rgb(239, 248, 255) 42%, rgb(255, 255, 255) 100%); }
.site-directory-inner { min-height: 58px; }
.directory-dropdown summary { display: flex; align-items: center; justify-content: center; min-width: 94px; color: rgb(29, 79, 133); background: linear-gradient(145deg, rgb(255, 255, 255), rgb(239, 248, 255)); }
.hero { padding-top: 34px; padding-bottom: 38px; }
.badge { letter-spacing: 0.12em; }
.hero h1 { font-weight: 950; line-height: 1.12; }
.hero p { font-size: 15px; line-height: 1.82; }
.rule-group > h2 { display: flex; align-items: center; min-height: 44px; margin: 8px 0px 2px; padding: 10px 15px; border: 1px solid rgba(213, 231, 252, 0.9); border-radius: 15px; color: rgb(23, 108, 206); background: linear-gradient(100deg, rgb(255, 255, 255), rgb(239, 248, 255)); box-shadow: rgba(36, 118, 253, 0.07) 0px 7px 20px; font-size: 13px; letter-spacing: 0.05em; }
.rule-group > h2::before { content: ""; width: 5px; height: 22px; margin-right: 9px; border-radius: 8px; background: linear-gradient(rgb(44, 207, 237), rgb(36, 118, 253)); box-shadow: rgba(36, 118, 253, 0.22) 0px 4px 9px; }
.card h3 { font-size: 19px; }
.card p, .card li { color: rgb(48, 75, 102); font-size: 14px; font-weight: 700; }
.qa-list details { box-shadow: rgba(36, 118, 253, 0.09) 0px 9px 24px; }
.bottom-nav span { border: 1px solid rgba(213, 231, 252, 0.86); background: rgb(239, 248, 255); }
.bottom-nav a:active span { transform: scale(0.94); }
@media (min-width: 760px) {
  .hero h1 { max-width: 520px; font-size: 48px; }
  .hero p { max-width: 610px; }
  .card { border-radius: 28px; }
}
@media (max-width: 620px) {
  .hero { padding-top: 28px; }
  .hero p { font-size: 14px; }
  .rule-group > h2 { margin-right: 2px; margin-left: 2px; }
  .card h3 { font-size: 18px; }
  .bottom-nav { border-radius: 22px; }
}
.hero h1 { background: linear-gradient(135deg, rgb(44, 207, 237) 0%, rgb(42, 186, 240) 34%, rgb(41, 162, 246) 62%, rgb(36, 118, 253) 100%) text; color: rgb(36, 118, 253); -webkit-text-fill-color: transparent; -webkit-text-stroke: 0.45px rgba(36, 118, 253, 0.62); filter: none; text-shadow: rgb(255, 255, 255) 0px 1px 0px, rgba(112, 181, 255, 0.46) 0px 3px 0px, rgba(36, 118, 253, 0.28) 0px 7px 14px; }
.bottom-nav { border: 1px solid rgb(213, 231, 252); background: rgba(255, 255, 255, 0.97); box-shadow: rgba(36, 118, 253, 0.16) 0px 10px 28px; }
.bottom-nav a { color: rgb(111, 132, 155); }
.bottom-nav span { color: rgb(112, 133, 156); border: 0px; background: transparent; font-size: 19px; font-weight: 900; }
.bottom-nav .active { color: rgb(36, 118, 253); }
.bottom-nav .active span { color: rgb(255, 255, 255); background: linear-gradient(145deg, rgb(44, 207, 237), rgb(41, 162, 246) 55%, rgb(36, 118, 253)); box-shadow: rgba(36, 118, 253, 0.28) 0px 6px 14px; }
@media (max-width: 620px) {
  .hero h1 { filter: none; -webkit-text-stroke: 0.4px rgba(25, 104, 224, 0.75); text-shadow: rgb(255, 255, 255) 0px 1px 0px, rgba(102, 174, 255, 0.48) 0px 3px 0px, rgba(36, 118, 253, 0.25) 0px 6px 12px; }
}
.hero h1 { font-family: "Arial Black", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; letter-spacing: -0.055em; color: rgb(36, 118, 253) !important; background: none !important; -webkit-text-fill-color: initial !important; -webkit-text-stroke: 0px !important; font-weight: 1000 !important; text-shadow: none !important; }
.hero h1 span { display: block; width: max-content; max-width: 100%; background: linear-gradient(105deg, rgb(44, 207, 237) 0%, rgb(42, 186, 240) 34%, rgb(41, 162, 246) 66%, rgb(36, 118, 253) 100%) text; color: rgb(36, 118, 253); -webkit-text-fill-color: transparent; -webkit-text-stroke: 1.2px rgb(39, 151, 247); paint-order: stroke; filter: drop-shadow(rgba(36, 118, 253, 0.23) 0px 5px 8px); }
@media (max-width: 620px) {
  .hero h1 { font-weight: 1000 !important; text-shadow: none !important; }
  .hero h1 span { -webkit-text-stroke: 1px rgb(39, 151, 247); filter: drop-shadow(rgba(36, 118, 253, 0.2) 0px 4px 6px); }
}
.site-directory .desktop-site-links { display: flex; position: static; width: auto; min-width: 0px; margin-left: auto; gap: 3px; padding: 0px; border: 0px; border-radius: 0px; background: transparent; box-shadow: none; }
.site-directory .desktop-site-links a { min-height: 0px; padding: 10px 11px; border-radius: 10px; color: rgb(82, 106, 131); font-size: 14px; font-weight: 800; white-space: nowrap; }
.site-directory .desktop-site-links a:hover, .site-directory .desktop-site-links a.active { color: rgb(255, 255, 255); background: linear-gradient(135deg, rgb(44, 207, 237), rgb(36, 118, 253)); box-shadow: rgba(36, 118, 253, 0.2) 0px 6px 14px; }
.directory-dropdown { display: none; }
.directory-dropdown .directory-scrim { display: none; }
.quick-nav { top: 59px; z-index: 55; }
.rule-group > h2, .qa-heading { position: sticky; z-index: 45; top: 116px; backdrop-filter: blur(16px); }
.rule-group > h2 { background: rgba(247, 252, 255, 0.96); box-shadow: rgba(36, 118, 253, 0.1) 0px 8px 20px; }
.qa-heading { background: linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(238, 248, 255, 0.96)); }
@media (max-width: 760px) {
  html { scroll-padding-top: 120px; }
  .site-directory-inner { justify-content: center; min-height: 59px; }
  .site-brand { margin: auto; }
  .site-directory .desktop-site-links { display: none; }
  .mobile-home { display: flex; position: fixed; z-index: 150; top: 8px; left: 9px; min-height: 43px; align-items: center; padding: 0px 14px; border: 1px solid var(--line); border-radius: 12px; background: rgb(255, 255, 255); box-shadow: rgba(36, 118, 253, 0.16) 0px 8px 20px; color: rgb(38, 57, 77); font-size: 14px; font-weight: 850; text-decoration: none; }
  .directory-dropdown { display: block; position: fixed; z-index: 150; top: 8px; right: 9px; margin: 0px; }
  .directory-dropdown summary { position: relative; z-index: 4; min-width: 94px; background: linear-gradient(135deg, rgb(44, 207, 237), rgb(36, 118, 253)); box-shadow: rgba(36, 118, 253, 0.25) 0px 8px 20px; color: rgb(255, 255, 255); }
  .directory-dropdown summary::after { color: rgb(255, 255, 255); }
  .directory-dropdown[open] > .directory-scrim { display: block; position: fixed; z-index: 1; inset: 0px; background: rgba(239, 248, 255, 0.98); backdrop-filter: blur(10px); }
  .site-directory .directory-dropdown nav { display: grid; position: fixed; z-index: 3; top: 58px; right: 9px; left: 9px; width: auto; grid-template-columns: repeat(2, minmax(0px, 1fr)); gap: 4px; padding: 8px; background: rgb(255, 255, 255); }
  .site-directory .directory-dropdown nav a { justify-content: center; min-height: 41px; background: rgb(247, 251, 255); }
  .site-directory .directory-dropdown nav a:last-child { grid-column: 1 / -1; }
  .quick-nav { top: 59px; }
  .rule-group > h2, .qa-heading { top: 116px; }
  .rule-group, .qa-section { scroll-margin-top: 124px; }
}
@media (min-width: 761px) {
  .bottom-nav { display: none; }
}
@media (max-width: 760px) {
  body { padding-bottom: 94px; }
  .bottom-nav { display: grid; position: fixed; z-index: 120; right: auto; bottom: max(8px,env(safe-area-inset-bottom)); left: 50%; width: min(100% - 16px, 720px); height: 76px; padding: 6px; transform: translateX(-50%); align-items: stretch; border: 1px solid rgba(213, 231, 252, 0.96); border-radius: 22px; background: rgba(255, 255, 255, 0.96); box-shadow: rgba(36, 118, 253, 0.18) 0px 12px 32px, rgb(255, 255, 255) 0px 1px 0px inset; backdrop-filter: blur(18px); }
  .bottom-nav a { display: flex; min-width: 0px; height: 100%; padding: 4px 2px; flex-direction: column; align-items: center; justify-content: center; gap: 3px; color: rgb(111, 132, 155); font-family: inherit; font-size: 12px; font-weight: 800; line-height: 1.15; text-decoration: none; }
  .bottom-nav a > span:first-child { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid rgba(213, 231, 252, 0.9); border-radius: 10px; background: rgb(239, 248, 255); color: rgb(36, 118, 253); font: 900 17px / 1 Arial; }
  .bottom-nav small { font-size: 12px; font-weight: 800; line-height: 1.15; }
  .bottom-nav a.active { color: rgb(36, 118, 253); }
  .bottom-nav a.active > span:first-child { border-color: transparent; background: linear-gradient(145deg, rgb(44, 207, 237), rgb(41, 162, 246) 55%, rgb(36, 118, 253)); box-shadow: rgba(36, 118, 253, 0.26) 0px 6px 14px; color: rgb(255, 255, 255); }
}