:root {
  color-scheme: light;
  --page: #fafbfe;
  --surface: #fff;
  --ink: #171d42;
  --muted: #5e647d;
  --purple: #5b4bd8;
  --purple-dark: #3b28a9;
  --lavender: #ede9ff;
  --border: #e9e9f3;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--page);
  scroll-behavior: smooth;
  font-synthesis: none;
}
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
:focus-visible { outline: 3px solid #7668ef; outline-offset: 4px; }
[hidden] { display: none !important; }
.symbols { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.shell { width: min(1100px, 91%); margin-inline: auto; }
[id] { scroll-margin-top: 22px; }

.site-header { background: linear-gradient(115deg, #fff, #f6f5fc); border-bottom: 1px solid var(--border); }
.header-inner { min-height: clamp(65px, 14vw, 140px); display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-block: 10px; }
.brand { display: inline-flex; align-items: center; gap: 10px; white-space: nowrap; font-size: 16px; font-weight: 750; }
.brand img { flex: none; border-radius: 23%; }
.header-brand { min-width: 0; gap: clamp(8px, 2vw, 23px); white-space: normal; }
.header-brand img { width: clamp(37px, 7vw, 74px); box-shadow: 0 2px 9px #23175509; }
.header-brand strong { display: block; font-size: clamp(15px, 2.8vw, 29px); line-height: 1.2; }
.header-brand small { display: block; margin-top: clamp(3px, 1vw, 11px); color: var(--muted); font-size: clamp(11px, 1.9vw, 20px); font-weight: 400; line-height: 1.4; }
.header-cta { display: inline-flex; align-items: center; gap: clamp(6px, 1.5vw, 16px); flex: none; min-height: clamp(40px, 7vw, 72px); padding: 7px clamp(11px, 3vw, 33px); color: var(--purple-dark); background: #eae5fd; border-radius: 999px; font-size: clamp(13px, 2.3vw, 24px); font-weight: 750; white-space: nowrap; }
.header-cta:hover { background: #e4dfff; }
.header-cta .icon { width: clamp(17px, 2.8vw, 28px); height: auto; aspect-ratio: 1; }

.hero { display: grid; gap: clamp(12px, 2.2vw, 23px); margin-block: clamp(12px, 2.3vw, 24px) clamp(16px, 3.2vw, 33px); }
.hero-copy { grid-area: intro; align-self: start; min-width: 0; }
.miniapp-pill { display: inline-flex; align-items: center; padding: clamp(3px, .75vw, 8px) clamp(9px, 2.2vw, 23px); border-radius: 999px; background: #5b50d8; color: #fff; font-size: clamp(11px, 2vw, 22px); font-weight: 700; line-height: 1.4; }
h1 { margin-top: clamp(7px, 1.55vw, 16px); font-size: clamp(20px, 4.7vw, 51px); font-weight: 850; line-height: 1.2; }
.hero-description { margin-top: clamp(5px, 1.5vw, 15px); color: var(--muted); font-size: clamp(12px, 2.35vw, 24px); line-height: 1.55; }
.hero-benefits { grid-area: benefits; align-self: start; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(5px, 1.25vw, 14px); margin: 0; padding: 0; list-style: none; }
.hero-benefits li { display: flex; align-items: flex-start; gap: clamp(4px, 1vw, 10px); min-width: 0; }
.hero-benefits strong, .hero-benefits small { display: block; line-height: 1.4; }
.hero-benefits strong { font-size: clamp(11px, 2.1vw, 23px); }
.hero-benefits small { margin-top: 3px; color: var(--muted); font-size: clamp(10px, 1.65vw, 18px); }
.benefit-icon { --size: clamp(17px, 3.85vw, 41px); display: grid; place-items: center; flex: none; width: var(--size); height: var(--size); border-radius: 27%; }
.benefit-icon .icon { width: 80%; height: 80%; }
.benefit-fast { color: #7743de; }
.benefit-fast .icon { fill: currentColor; }
.benefit-wechat { color: #5c9cf5; }
.benefit-practice { color: #25bb93; }
.benefit-practice .icon { fill: currentColor; }
.hero-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(8px, 2.6vw, 27px); margin-top: clamp(0px, 1vw, 10px); }
.action { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: clamp(4px, .85vw, 9px); min-width: 0; min-height: clamp(101px, 20vw, 205px); padding: clamp(10px, 3vw, 32px); border-radius: clamp(11px, 2.2vw, 23px); color: var(--action-ink); background: var(--action-bg); }
.action:hover { background: var(--action-hover); }
.action-buy { --action-ink: #4a26a3; --action-bg: #f3f0fe; --action-hover: #ebe2fc; --action-icon: #873cdd; --action-accent: #e9d8ff; }
.action-redeem { --action-ink: #293da5; --action-bg: #ebf3fe; --action-hover: #e1edff; --action-icon: #568df0; --action-accent: #dcecff; }
.action-support { --action-ink: #226269; --action-bg: #ecfaf6; --action-hover: #ddf4ec; --action-icon: #17a781; --action-accent: #d7f5ea; }
.action-icon { --size: clamp(26px, 5.2vw, 56px); display: grid; place-items: center; width: var(--size); height: var(--size); margin-bottom: clamp(1px, .55vw, 6px); border-radius: 50%; color: var(--action-icon); background: var(--action-accent); }
.action-icon .icon { width: 71%; height: 71%; stroke-width: 2; }
.action-redeem .action-icon { background: #629bf4; color: #fff; }
.action strong { font-size: clamp(13px, 2.55vw, 28px); line-height: 1.25; }
.action-detail { display: flex; align-items: center; justify-content: space-between; gap: 2px; width: 100%; }
.action-detail small { color: var(--muted); font-size: clamp(10px, 1.8vw, 19px); line-height: 1.3; }
.action-detail .icon { width: clamp(13px, 2.45vw, 26px); height: auto; aspect-ratio: 1; }

.access-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 33%);
  grid-template-areas: "intro qr" "benefits qr";
  align-items: center;
  gap: clamp(12px, 2vw, 21px) clamp(12px, 2.1vw, 23px);
  min-height: clamp(190px, 39.4vw, 414px);
  padding: clamp(13px, 2.7vw, 30px);
  border: 1px solid #efeff7;
  border-radius: clamp(14px, 2.2vw, 23px);
  background: radial-gradient(ellipse at 97% 88%, #dedbfb, transparent 38%),
              radial-gradient(ellipse at 88% 9%, #e6edfd, transparent 48%),
              linear-gradient(118deg, #fff, #f7f8fd);
  box-shadow: 0 3px 15px #20275a08;
}
.access-panel::before { content: ""; position: absolute; z-index: -1; inset: -30% -12% -31% 57%; border-radius: 51% 0 0 58%; background: linear-gradient(164deg, #e4ecfd86, #dcd5fb57); transform: rotate(13deg); }
.qr-card { grid-area: qr; display: grid; place-items: center; padding: clamp(5px, 1.5vw, 16px); border-radius: clamp(11px, 2.6vw, 27px); background: #fff; cursor: zoom-in; }
.qr-card:hover { box-shadow: 0 0 0 2px #a493f5; }
.qr-card img { width: 100%; max-width: 258px; }
.access-search { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 5px 8px; padding: clamp(8px, 2.3vw, 24px) clamp(10px, 3vw, 31px); border-radius: clamp(11px, 2.2vw, 23px); background: #f3f1fe; color: var(--muted); font-size: clamp(12px, 2.1vw, 22px); line-height: 1.4; }
.access-search > p:first-child { display: flex; align-items: center; gap: clamp(5px, 1.45vw, 15px); min-width: 0; }
.access-search strong { color: var(--purple-dark); font-size: 1.13em; }
.search-icon { width: clamp(18px, 3.7vw, 39px); height: auto; aspect-ratio: 1; padding: 4px; border-radius: 34%; color: var(--purple); background: #e9e1fc; }
.copy-button { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 36px; padding: 5px 11px; border: 1px solid #ded7ff; border-radius: 8px; background: #f2eeff; color: var(--purple-dark); font-size: 12px; font-weight: 700; cursor: pointer; }
.copy-button:hover { background: #e7dfff; }
.copy-button .icon { width: 15px; height: 15px; }
.copy-status { font-size: 11px; line-height: 1.4; color: var(--purple-dark); text-align: center; }
.access-search .copy-button { min-height: clamp(38px, 6.4vw, 66px); padding-inline: clamp(9px, 2.2vw, 24px); border-radius: 999px; background: #ffffff66; font-size: clamp(12px, 2vw, 22px); white-space: nowrap; }
.access-search .copy-button:hover { background: #fff; }
.access-search .copy-button .icon { width: clamp(15px, 2.4vw, 25px); height: auto; aspect-ratio: 1; }
.access-search .copy-status { grid-column: 1 / -1; text-align: start; }
.access-search .copy-status:empty { display: none; }

.redemption { padding: 31px 0 39px; border-top: 1px solid var(--border); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
h2 { font-size: clamp(24px, 2.45vw, 34px); font-weight: 800; letter-spacing: -.02em; line-height: 1.25; }
.section-heading h2 { display: flex; align-items: center; gap: clamp(8px, 1.6vw, 17px); }
.section-heading h2::before { content: ""; flex: none; width: clamp(4px, .8vw, 8px); height: 1em; border-radius: 99px; background: var(--purple); }
.redemption .section-heading { flex-direction: column; align-items: stretch; gap: clamp(9px, 2.2vw, 23px); margin-bottom: clamp(12px, 2.7vw, 29px); }
.redemption h2 { font-size: clamp(24px, 4vw, 43px); }
.account-note { display: flex; align-items: flex-start; gap: clamp(7px, 1.4vw, 14px); padding: clamp(8px, 1.1vw, 12px) clamp(10px, 2.7vw, 28px); border-radius: clamp(9px, 1.25vw, 13px); background: #f2effc; color: var(--ink); font-size: clamp(12px, 2vw, 21px); line-height: 1.55; }
.account-note .icon { width: clamp(16px, 2.55vw, 26px); height: auto; aspect-ratio: 1; margin-top: 2px; }
.steps { display: grid; gap: clamp(10px, 2vw, 21px); list-style: none; margin: 0; padding: 0; }
.step-card { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: clamp(5px, 1.1vw, 12px) clamp(9px, 2.8vw, 29px); padding: clamp(13px, 2.8vw, 30px); background: var(--surface); border: 1px solid #efeff6; border-radius: clamp(13px, 2.3vw, 24px); box-shadow: 0 2px 12px #20275a07; }
.step-heading { display: contents; }
.step-number { grid-row: 1 / span 3; display: grid; place-items: center; width: clamp(32px, 5.7vw, 59px); aspect-ratio: 1; border-radius: 50%; background: var(--lavender); color: var(--purple-dark); font: 800 clamp(13px, 2.3vw, 24px)/1 system-ui, sans-serif; }
.step-heading h3 { grid-column: 2; align-self: center; font-size: clamp(16px, 3.25vw, 34px); line-height: 1.35; }
.step-card > p { grid-column: 2; color: var(--muted); font-size: clamp(13px, 2.15vw, 22px); line-height: 1.6; }
.step-card > p strong { color: var(--ink); }
.step-visual { grid-column: 2; width: min(100%, 705px); margin-top: clamp(5px, 1.8vw, 19px); }
.mock-tabbar { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(0, 1.32fr); width: 100%; padding: clamp(3px, .9vw, 9px); background: #fff; border: 1px solid #e9e8f3; border-radius: clamp(10px, 2.3vw, 24px); box-shadow: 0 3px 9px #20275a09; }
.mock-tabbar > div { display: grid; gap: clamp(2px, .55vw, 6px); place-items: center; padding-block: clamp(6px, 1.5vw, 16px); color: #5e647d; font-size: clamp(10px, 1.9vw, 20px); white-space: nowrap; }
.mock-tabbar .icon { width: clamp(15px, 3.3vw, 34px); height: auto; aspect-ratio: 1; }
.mock-tabbar .mock-active { border-radius: clamp(7px, 1.6vw, 17px); background: #eee8ff; color: var(--purple-dark); font-weight: 750; }
.mock-recharge { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(6px, 1.2vw, 12px); width: min(100%, 560px); }
.mock-entry { display: grid; align-content: center; min-width: 0; min-height: clamp(49px, 8vw, 82px); padding: 5px clamp(6px, 1.2vw, 13px); background: #fff; border: 1px solid #ded7ef; border-radius: 9px; }
.mock-entry-muted { color: var(--muted); }
.mock-entry-active { color: var(--purple-dark); border-color: #a797f0; box-shadow: inset 0 0 0 1px #c5b9f1; }
.mock-entry strong, .mock-entry small { display: block; }
.mock-entry strong { font-size: clamp(12px, 1.9vw, 20px); }
.mock-entry small { margin-top: 3px; font-size: clamp(10px, 1.5vw, 15px); color: var(--muted); }
.mock-form { width: min(100%, 560px); }
.mock-input, .mock-submit { display: flex; align-items: center; min-height: clamp(31px, 4.5vw, 47px); border-radius: 7px; font-size: clamp(11px, 1.6vw, 17px); }
.mock-input { gap: 6px; padding-inline: 8px; background: #fff; border: 1px solid #ddd3f7; color: var(--muted); }
.mock-input .icon { width: 14px; height: 14px; }
.mock-submit { justify-content: center; margin-top: 5px; background: var(--purple); color: #fff; font-weight: 750; }
.success-note { display: flex; align-items: center; gap: 12px; margin-top: 14px; padding: 13px 16px; border: 1px solid #d8ecde; border-radius: 13px; color: #2d5941; background: #edf8f0; font-size: 14px; line-height: 1.65; }
.success-note h3 { font-size: 15px; }
.success-note p { margin-top: 2px; }
.success-icon { display: grid; flex: none; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: #27714b; background: #d9f1e1; }
.success-icon .icon { width: 17px; height: 17px; }
.redeem-help { margin-top: 10px; padding: 0 14px; border: 1px solid var(--border); border-radius: 11px; background: #fff; color: var(--muted); font-size: 14px; line-height: 1.65; }
.redeem-help summary { padding-block: 11px; color: var(--ink); font-weight: 700; cursor: pointer; }
.redeem-help summary::marker { color: var(--purple); }
.redeem-help p { padding: 0 0 13px 16px; }
.redeem-help a { color: var(--purple-dark); text-decoration: underline; text-underline-offset: 2px; }

.features { position: relative; left: 50%; width: min(1160px, 102.8%); padding-bottom: clamp(24px, 4vw, 43px); transform: translateX(-50%); }
.feature-banner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 52%); align-items: center; min-height: clamp(142px, 29vw, 320px); overflow: hidden; padding: 0 clamp(16px, 3.1vw, 34px); border-radius: clamp(14px, 2.3vw, 24px); background: radial-gradient(ellipse at 74% -26%, #b4cbf7, transparent 76%), linear-gradient(170deg, #cedcfe, #f0f4fd 86%); }
.feature-banner h2 { font-size: clamp(24px, 6.2vw, 66px); }
.feature-banner-art { width: 100%; justify-self: end; }
.feature-cta { display: inline-flex; align-items: center; gap: clamp(6px, 1.25vw, 13px); min-height: 40px; margin-top: clamp(0px, 1.35vw, 14px); color: var(--ink); font-size: clamp(13px, 3vw, 30px); font-weight: 700; }
.feature-cta:hover { text-decoration: underline; }
.feature-cta .icon { width: clamp(16px, 3vw, 31px); height: auto; aspect-ratio: 1; }
.feature-grid { display: grid; gap: clamp(12px, 2.35vw, 25px); margin-top: clamp(12px, 2.35vw, 25px); }
.feature-grid article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 29%);
  grid-template-areas: "heading art" "copy art" "tags tags";
  align-items: center;
  gap: clamp(8px, 1.7vw, 18px) clamp(8px, 1.4vw, 15px);
  padding: clamp(13px, 3.3vw, 35px);
  border: 1px solid var(--feature-line);
  border-radius: clamp(14px, 3.2vw, 34px);
  background: linear-gradient(125deg, var(--feature-bg), var(--feature-soft));
  box-shadow: 0 5px 14px #2337540a;
}
.feature-practice { --feature-bg: #eee9fe; --feature-soft: #f0eafb; --feature-line: #e0d5fa; --feature-accent: #dcd0f9; --feature-icon: #7547dc; --feature-text: #4b27a8; }
.feature-skills { --feature-bg: #e7eefd; --feature-soft: #edf4fe; --feature-line: #d3e3fa; --feature-accent: #c8ddfb; --feature-icon: #286ddd; --feature-text: #2157b4; }
.feature-test { --feature-bg: #e8f6f2; --feature-soft: #eaf8f3; --feature-line: #d2eee3; --feature-accent: #c0edde; --feature-icon: #139a78; --feature-text: #087451; }
.feature-query { --feature-bg: #fdf0e0; --feature-soft: #fff5e8; --feature-line: #f8e3c6; --feature-accent: #ffe0b9; --feature-icon: #d56a16; --feature-text: #a75214; }
.feature-heading { grid-area: heading; display: flex; align-items: center; gap: clamp(9px, 3vw, 32px); min-width: 0; }
.feature-icon { --size: clamp(40px, 10.2vw, 107px); display: grid; place-items: center; flex: none; width: var(--size); height: var(--size); border-radius: 24%; background: var(--feature-accent); color: var(--feature-icon); }
.feature-icon .icon { width: 56%; height: 56%; stroke-width: 2.05; }
.feature-grid h3 { font-size: clamp(17px, 3.55vw, 38px); line-height: 1.3; }
.feature-path { margin-top: clamp(3px, 1vw, 10px); color: var(--feature-text); font-size: clamp(12px, 2.45vw, 26px); line-height: 1.45; }
.feature-art { grid-area: art; width: 100%; max-width: 235px; justify-self: end; }
.feature-description { grid-area: copy; color: var(--muted); font-size: clamp(13px, 2.48vw, 26px); line-height: 1.58; }
.feature-modes { grid-area: copy; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px clamp(12px, 3vw, 32px); margin: 0; }
.feature-modes dt, .feature-modes dd { font-size: clamp(13px, 2.42vw, 25px); line-height: 1.5; }
.feature-modes dt { font-weight: 750; }
.feature-modes dd { margin: 2px 0 0; color: var(--muted); }
.feature-tags { grid-area: tags; display: flex; flex-wrap: wrap; gap: clamp(5px, 1.3vw, 14px); padding: 0; margin: 0; list-style: none; }
.feature-tags li { padding: clamp(4px, 1vw, 10px) clamp(7px, 1.8vw, 19px); border: 1px solid var(--feature-line); border-radius: 999px; background: #ffffffb8; color: var(--feature-text); font-size: clamp(11px, 1.9vw, 20px); font-weight: 700; line-height: 1.4; box-shadow: 0 2px 6px #29395b09; }

.support { --support-ink: #123a34; --support-text: #36594f; --support-action: #076644; position: relative; left: 50%; width: min(1160px, calc(100% / .91)); padding: 0 clamp(16px, 4.9vw, 52px) clamp(16px, 3.3vw, 35px); overflow: hidden; transform: translateX(-50%); border-radius: clamp(15px, 3.1vw, 33px); background: radial-gradient(ellipse at 16% 0, #d1f5e4, transparent 47%), radial-gradient(ellipse at 100% 24%, #c4efd9, transparent 52%), linear-gradient(170deg, #e9f7f1, #f3f9f8 66%); }
.support-banner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 48%); align-items: center; gap: 4px; min-height: clamp(145px, 41.3vw, 425px); padding-inline: clamp(4px, 1.8vw, 19px); }
.support-banner h2 { color: var(--support-ink); font-size: clamp(27px, 7.8vw, 80px); }
.support-banner p { margin-top: clamp(5px, 1.35vw, 14px); color: var(--support-text); font-size: clamp(13px, 2.7vw, 28px); line-height: 1.55; }
.support-banner p::after { content: ""; display: block; width: clamp(30px, 8.7vw, 89px); height: clamp(4px, 1.1vw, 11px); margin-top: clamp(8px, 2.4vw, 24px); border-radius: 99px; background: #4ac182; }
.support-banner-art { width: 100%; align-self: end; }
.support-grid { display: grid; gap: clamp(13px, 3.9vw, 41px); }
.support-contact, .support-scan { min-width: 0; padding: clamp(13px, 4vw, 42px); border: 1px solid #ffffffd4; border-radius: clamp(15px, 3.8vw, 40px); background: #fff; box-shadow: 0 8px 25px #226c5011; }
.support-profile { display: flex; align-items: center; gap: clamp(10px, 2.65vw, 28px); }
.support-profile img { --size: clamp(44px, 11.8vw, 123px); width: var(--size); height: var(--size); flex: none; border-radius: 24%; object-fit: cover; }
.support-profile h3, .support-scan h3 { color: var(--support-ink); font-size: clamp(17px, 4vw, 42px); line-height: 1.3; }
.support-profile p, .support-scan p, .support-hint { margin-top: clamp(4px, 1.25vw, 13px); color: var(--support-text); font-size: clamp(12px, 2.65vw, 28px); line-height: 1.55; }
.support-id-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 4px 8px; margin-top: clamp(10px, 3vw, 32px); padding: clamp(9px, 2.6vw, 28px); border-radius: clamp(10px, 2.5vw, 26px); background: #edf7f2; }
.support-id-row span, .support-id-row strong { display: block; }
.support-id-row span { color: var(--support-text); font-size: clamp(11px, 2.55vw, 27px); }
.support-id-row strong { margin-top: 2px; color: var(--support-action); font-size: clamp(17px, 4.25vw, 44px); line-height: 1.2; }
.support-id-row .copy-button, .support-download { min-height: clamp(37px, 8.1vw, 84px); padding: 5px clamp(8px, 2.7vw, 29px); border: 1px solid #8ccdb0; border-radius: 999px; background: #f4fbf7; color: var(--support-action); font-size: clamp(11px, 2.65vw, 28px); font-weight: 750; white-space: nowrap; }
.support-id-row .copy-button .icon, .support-download .icon { width: clamp(15px, 3.2vw, 34px); height: auto; aspect-ratio: 1; }
.support-id-row .copy-button:hover, .support-download:hover { background: #e2f1e9; }
.support-id-row .copy-status { grid-column: 1 / -1; color: var(--support-action); text-align: start; }
.support-id-row .copy-status:empty { display: none; }
.support-hint { display: flex; align-items: center; gap: clamp(7px, 1.6vw, 17px); margin-top: clamp(11px, 3.4vw, 35px); }
.support-hint .icon { width: clamp(18px, 4.1vw, 42px); height: auto; aspect-ratio: 1; color: #18a168; }
.support-scan { display: grid; grid-template-columns: minmax(0, 49%) minmax(0, 1fr); align-items: center; gap: clamp(8px, 3.1vw, 33px); }
.support-qr-frame { padding: clamp(6px, 2.1vw, 22px); border: 1px solid #ecf4ef; border-radius: clamp(10px, 2.7vw, 29px); background: #fff; box-shadow: 0 5px 14px #2673540e; }
.support-qr-frame img { width: 100%; }
.support-scan-copy { min-width: 0; padding-left: clamp(7px, 2.7vw, 29px); border-left: 1px solid #deeee5; }
.support-download { display: inline-flex; align-items: center; justify-content: center; gap: clamp(5px, 1.35vw, 14px); margin-top: clamp(7px, 3vw, 32px); border-color: transparent; background: #e5f5ed; }

.site-footer { margin-top: clamp(13px, 2.4vw, 26px); padding-bottom: clamp(28px, 6.4vw, 67px); background: radial-gradient(ellipse at 88% 160%, #b9ebd0 43%, transparent 44%), radial-gradient(ellipse at 12% 176%, #b9ebd0 47%, transparent 48%); }
.footer-guide { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: clamp(9px, 2.15vw, 23px); padding: clamp(12px, 3vw, 32px); border-radius: clamp(13px, 3.45vw, 37px); color: #123a34; background: #e8f5ef; }
.footer-guide:hover { background: #def1e7; }
.footer-guide img { width: clamp(34px, 7.3vw, 75px); border-radius: 24%; }
.footer-guide strong { font-size: clamp(15px, 2.8vw, 29px); }
.footer-guide p { margin-top: clamp(2px, .9vw, 9px); color: #36594f; font-size: clamp(11px, 2.1vw, 22px); line-height: 1.55; }
.footer-guide .icon { width: clamp(16px, 3.1vw, 32px); height: auto; aspect-ratio: 1; color: #378a6c; }

#wechat-guide {
  width: min(540px, calc(100% - 24px));
  max-height: calc(100% - 24px);
  max-height: calc(100dvh - 24px);
  margin: auto;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  border: 2px solid #e5e0ff;
  border-radius: clamp(21px, 6vw, 38px);
  background: #fdfcff;
  color: #25275b;
  text-align: center;
  box-shadow: 0 18px 65px #26175f78, 0 0 22px #927af557;
}
#wechat-guide::backdrop { background: #2c224caa; backdrop-filter: blur(3px); }
body:has(#wechat-guide[open]) { overflow: hidden; }
.dialog-close-form { position: sticky; z-index: 2; top: 6px; height: 0; }
.dialog-close { display: grid; place-items: center; position: absolute; top: 3px; right: clamp(7px, 2.4vw, 16px); width: 42px; height: 42px; color: #6250dc; cursor: pointer; border: 0; border-radius: 50%; background: #f8f6ffd9; }
.dialog-close .icon { width: 24px; height: 24px; stroke-width: 2.5; }
.dialog-close:hover { background: #ece7fd; }
.dialog-panel {
  --qr-size: min(56%, 280px);
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(18px, 4.5vw, 24px) clamp(13px, 4vw, 25px) clamp(25px, 6vw, 37px);
  background: radial-gradient(ellipse at 0 0, #e7e1fd, transparent 31%),
              radial-gradient(ellipse at 100% 10%, #eeebfc, transparent 32%),
              linear-gradient(155deg, #fbfaff, #fff 40%, #f8f6ff);
}
.dialog-brand { display: flex; align-items: center; justify-content: center; gap: 8px; color: #5a48c9; font-size: clamp(14px, 4vw, 20px); font-weight: 800; }
.dialog-brand-icon, .dialog-scan-label > span { --size: clamp(24px, 6.8vw, 34px); display: grid; flex: none; place-items: center; width: var(--size); height: var(--size); border-radius: 50%; background: linear-gradient(150deg, #a18af9, #5e46e8); color: #fff; }
.dialog-brand-icon .icon, .dialog-scan-label .icon { width: 65%; height: 65%; stroke-width: 2.4; }
#dialog-title { display: flex; align-items: center; justify-content: center; gap: clamp(5px, 2vw, 11px); margin-top: 8px; color: #22245b; font-size: clamp(25px, 7.3vw, 43px); font-weight: 850; line-height: 1.18; }
.dialog-flare { position: relative; flex: none; width: clamp(12px, 4vw, 23px); height: clamp(19px, 5.2vw, 30px); }
.dialog-flare::before, .dialog-flare::after { content: ""; position: absolute; right: 0; width: 93%; height: 28%; border-radius: 65% 75% 72% 55%; background: linear-gradient(160deg, #ffe998, #ffba3d); transform: rotate(34deg); }
.dialog-flare::before { top: 20%; }
.dialog-flare::after { top: 62%; width: 71%; transform: rotate(12deg); }
.dialog-flare:last-child { transform: scaleX(-1); }
.dialog-subtitle { margin-top: 5px; color: #655d9d; font-size: clamp(13px, 3.8vw, 19px); font-weight: 700; line-height: 1.45; }
.dialog-qr-stage { position: relative; isolation: isolate; margin-top: clamp(9px, 2.4vw, 14px); }
.dialog-art { position: absolute; z-index: -1; inset: 0 auto 0 -7px; width: calc(100% + 14px); height: 100%; object-fit: fill; pointer-events: none; }
.dialog-qr { width: var(--qr-size); margin-inline: auto; padding: clamp(7px, 2.2vw, 15px); border: 1px solid #eae5ff; border-radius: clamp(14px, 4vw, 23px); background: #fff; box-shadow: 0 6px 20px #6d55cc28; }
.dialog-code { aspect-ratio: 258 / 244; overflow: hidden; }
.dialog-code img { width: 100%; }
.dialog-scan-label { display: flex; align-items: center; justify-content: center; gap: clamp(5px, 1.5vw, 8px); width: fit-content; min-width: var(--qr-size); max-width: 100%; margin: 8px auto 0; padding: 5px clamp(7px, 2.5vw, 14px); border: 1px solid #eeeafd; border-radius: 999px; background: #ffffffcc; color: #34365c; font-size: clamp(11px, 3.3vw, 16px); font-weight: 750; box-shadow: 0 3px 9px #6d55cc16; }
.dialog-scan-label > span { --size: clamp(17px, 5.1vw, 24px); background: #08ad62; }
.dialog-rule { display: flex; align-items: center; gap: 7px; width: var(--qr-size); margin: clamp(8px, 2vw, 13px) auto 6px; }
.dialog-rule::before, .dialog-rule::after { content: ""; flex: 1; height: 1px; background: #ded7fc; }
.dialog-rule span { width: 7px; height: 7px; border-radius: 50%; background: #7761ee; }
.dialog-instructions { display: grid; gap: 4px; width: fit-content; max-width: 100%; margin: 0 auto; padding: 0; list-style: none; color: #49476b; text-align: left; font-size: clamp(12px, 3.45vw, 15px); line-height: 1.48; }
.dialog-instructions li { display: flex; align-items: center; gap: 7px; }
.dialog-instructions li > span { --size: clamp(25px, 6.7vw, 33px); display: grid; flex: none; place-items: center; width: var(--size); height: var(--size); border-radius: 50%; background: #f0ebfe; color: #654fe0; }
.dialog-instructions .icon { width: 65%; height: 65%; }
#wechat-guide .dialog-copy { gap: 8px; min-height: clamp(42px, 11vw, 54px); margin-top: clamp(10px, 2.8vw, 17px); padding: 7px clamp(11px, 4vw, 25px); border: 1px solid #8e79f5; border-radius: clamp(13px, 3.8vw, 23px); background: linear-gradient(160deg, #7059eb, #5d48d8); color: #fff; font-size: clamp(13px, 3.95vw, 18px); font-weight: 800; box-shadow: 0 5px 15px #6c53dc55; }
#wechat-guide .dialog-copy:hover { background: #5943ce; }
.dialog-copy .icon { width: clamp(17px, 5vw, 23px); height: auto; aspect-ratio: 1; stroke-width: 2; }
#wechat-guide .copy-status:not(:empty) { margin-top: 6px; }
.dialog-waves { position: absolute; z-index: -1; inset: auto 0 0; width: 100%; height: clamp(35px, 13vw, 68px); pointer-events: none; }

@media (max-width: 720px) {
  .redemption { padding-block: 24px 29px; }
  .section-heading { align-items: center; gap: 9px; margin-bottom: 15px; }
  .success-note { align-items: flex-start; padding: 10px; gap: 8px; }
}
@media (max-width: 560px) {
  .access-panel { gap: 5px clamp(8px, 2vw, 12px); min-height: clamp(150px, 39.4vw, 221px); padding: clamp(10px, 2.7vw, 15px); }
  .hero-benefits { align-self: center; gap: 3px; }
  .hero-benefits li { align-items: center; gap: 3px; }
  .hero-benefits strong { font-size: clamp(9px, 2.24vw, 11px); }
  .hero-benefits small { margin-top: 2px; font-size: clamp(8px, 1.78vw, 10px); }
  .benefit-icon { --size: clamp(14px, 3.75vw, 20px); }
  .access-search { padding-block: clamp(7px, 1.95vw, 11px); }
  .hero-actions { margin-top: 3px; }
  .action { min-height: clamp(88px, 20vw, 112px); }
  .redemption { padding-top: clamp(16px, 3.9vw, 24px); }
  .feature-grid article { grid-template-columns: minmax(0, 1fr) minmax(0, 24%); grid-template-areas: "heading art" "copy copy" "tags tags"; }
  .support-scan { grid-template-columns: minmax(0, 46%) minmax(0, 1fr); }
}
@media (max-width: 360px) {
  .access-panel { grid-template-columns: minmax(0, 1fr) minmax(0, 40%); }
  .hero-benefits li { flex-direction: column; align-items: flex-start; gap: 2px; }
}
@media (min-width: 768px) {
  .qr-card { margin-top: clamp(0px, 1.35vw, 15px); }
}
@media (min-width: 1024px) and (min-aspect-ratio: 1/1) {
  .shell { width: min(1160px, calc(100% - 64px)); }
  .header-inner { min-height: 76px; }
  .header-brand { gap: 12px; }
  .header-brand img { width: 44px; }
  .header-brand strong { font-size: 20px; }
  .header-brand small { margin-top: 4px; font-size: 13px; }
  .header-cta { gap: 8px; min-height: 44px; padding-inline: 17px; font-size: 15px; }
  .header-cta .icon { width: 19px; }

  .hero { gap: 14px; margin-block: 20px 18px; }
  .access-panel { grid-template-columns: minmax(0, 1fr) 218px; min-height: 270px; gap: 13px 24px; padding: 18px 28px; border-radius: 18px; }
  .miniapp-pill { padding: 4px 13px; font-size: 13px; }
  .hero h1 { margin-top: 12px; font-size: 40px; }
  .hero-description { margin-top: 8px; font-size: 16px; }
  .hero-benefits { width: min(100%, 620px); gap: 14px; }
  .hero-benefits li { gap: 7px; }
  .hero-benefits strong { font-size: 15px; }
  .hero-benefits small { font-size: 13px; }
  .benefit-icon { --size: 28px; }
  .qr-card { margin: 0; padding: 9px; border-radius: 16px; }
  .access-search { padding: 8px 16px; border-radius: 13px; font-size: 15px; }
  .search-icon { width: 25px; }
  .access-search .copy-button { min-height: 40px; padding-inline: 13px; font-size: 13px; }
  .access-search .copy-button .icon { width: 16px; }
  .hero-actions { gap: 14px; margin-top: 0; }
  .action { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; grid-template-rows: auto auto; align-content: center; gap: 3px 12px; min-height: 76px; padding: 12px 15px; border-radius: 13px; }
  .action-icon { --size: 40px; grid-column: 1; grid-row: 1 / span 2; align-self: center; margin: 0; }
  .action strong { grid-column: 2; grid-row: 1; font-size: 17px; }
  .action-detail { display: contents; }
  .action-detail small { grid-column: 2; grid-row: 2; font-size: 13px; }
  .action-detail .icon { grid-column: 3; grid-row: 1 / span 2; align-self: center; width: 20px; }

  .redemption { padding-block: 19px 25px; }
  .redemption .section-heading { flex-direction: row; align-items: center; gap: 12px; margin-bottom: 14px; }
  .redemption h2 { gap: 9px; font-size: 26px; }
  .redemption h2::before { width: 5px; }
  .account-note { gap: 7px; padding: 6px 10px; border-radius: 8px; font-size: 13px; }
  .account-note .icon { width: 16px; }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
  .step-card { grid-template-rows: auto 1fr auto; gap: 6px 9px; padding: 14px; border-radius: 14px; }
  .step-number { grid-row: 1 / span 2; width: 29px; font-size: 13px; }
  .step-heading h3 { font-size: 17px; }
  .step-card > p { font-size: 13px; }
  .step-visual { display: grid; align-items: center; grid-column: 1 / -1; width: 100%; min-height: 69px; margin-top: 6px; }
  .mock-tabbar { padding: 4px; border-radius: 10px; }
  .mock-tabbar > div { gap: 3px; padding-block: 5px; font-size: 10px; }
  .mock-tabbar .icon { width: 17px; }
  .mock-tabbar .mock-active { border-radius: 7px; }
  .mock-entry { min-height: 49px; }
  .mock-entry strong { font-size: 13px; }
  .mock-entry small { font-size: 11px; }
  .mock-input, .mock-submit { min-height: 29px; font-size: 12px; }

  .features, .support { position: static; width: 100%; transform: none; }
  .features { padding-bottom: 23px; }
  .feature-banner { min-height: 150px; padding-inline: 23px; border-radius: 16px; }
  .feature-banner h2 { font-size: 34px; }
  .feature-banner-art { max-width: 245px; }
  .feature-cta { gap: 7px; margin-top: 4px; font-size: 16px; }
  .feature-cta .icon { width: 18px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; margin-top: 13px; }
  .feature-grid article { grid-template-columns: minmax(0, 1fr) minmax(0, 26%); gap: 9px; padding: 15px; border-radius: 15px; }
  .feature-heading { gap: 10px; }
  .feature-icon { --size: 43px; }
  .feature-grid h3 { font-size: 18px; }
  .feature-path { margin-top: 3px; font-size: 13px; }
  .feature-description, .feature-modes dt, .feature-modes dd { font-size: 13px; }
  .feature-modes { gap: 6px 12px; }
  .feature-tags { gap: 5px; }
  .feature-tags li { padding: 4px 7px; font-size: 11px; }

  .support { padding: 0 18px 18px; border-radius: 17px; }
  .support-banner { min-height: 158px; padding-inline: 5px; }
  .support-banner h2 { font-size: 34px; }
  .support-banner p { margin-top: 6px; font-size: 15px; }
  .support-banner p::after { width: 46px; height: 5px; margin-top: 11px; }
  .support-banner-art { max-width: 224px; justify-self: end; }
  .support-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
  .support-contact, .support-scan { padding: 16px; border-radius: 15px; }
  .support-profile { gap: 10px; }
  .support-profile img { --size: 52px; }
  .support-profile h3, .support-scan h3 { font-size: 19px; }
  .support-profile p, .support-scan p, .support-hint { margin-top: 4px; font-size: 13px; }
  .support-id-row { margin-top: 12px; padding: 9px; border-radius: 9px; }
  .support-id-row span { font-size: 12px; }
  .support-id-row strong { font-size: 19px; }
  .support-id-row .copy-button, .support-download { min-height: 38px; padding-inline: 9px; font-size: 13px; }
  .support-id-row .copy-button .icon, .support-download .icon { width: 16px; }
  .support-hint { gap: 7px; margin-top: 11px; }
  .support-hint .icon { width: 20px; }
  .support-scan { grid-template-columns: minmax(0, 154px) minmax(0, 1fr); gap: 13px; }
  .support-qr-frame { padding: 6px; border-radius: 9px; }
  .support-scan-copy { padding-left: 12px; }
  .support-download { gap: 6px; margin-top: 10px; }
  .site-footer { margin-top: 15px; padding-bottom: 32px; }
  .footer-guide { gap: 11px; padding: 13px 16px; border-radius: 14px; }
  .footer-guide img { width: 40px; }
  .footer-guide strong { font-size: 16px; }
  .footer-guide p { margin-top: 3px; font-size: 12px; }
  .footer-guide .icon { width: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
}