/* 首页：九个整屏场景，每屏到达后按时间线逐个出场。 */

/* 0 首屏 */
#s-hero .bgv { position: absolute; inset: 0; z-index: -1; }
#s-hero video, #s-hero .poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(.58) saturate(.9); }
#s-hero .bgv::after { content: ""; position: absolute; inset: 0; background: radial-gradient(62% 72% at 22% 42%, rgba(3, 5, 12, .74), rgba(3, 5, 12, .3) 62%, transparent 85%), linear-gradient(90deg, rgba(3, 5, 12, .45), transparent 55%), linear-gradient(0deg, rgba(3, 4, 9, .6), transparent 12%), linear-gradient(180deg, rgba(3, 4, 9, .35), transparent 16%); }
/* 口号放在左上，按钮紧跟其后；视频里的字幕在画面下方，互不遮挡 */
#s-hero { justify-content: flex-start; }
#s-hero > .in { text-align: left; padding-top: calc(var(--nav-h) + clamp(20px, 7vh, 80px)); padding-right: 0; }
#s-hero .eyebrow { justify-content: flex-start; }
#s-hero .eyebrow::after { content: ""; width: 26px; height: 1px; background: currentColor; opacity: .7; }
#s-hero .display { --lb: #a9e4ff; font-size: clamp(50px, 7vw, 144px); line-height: 1.08; margin-top: 14px; color: #fff; filter: drop-shadow(0 0 2px rgba(0, 6, 16, .9)) drop-shadow(0 6px 24px rgba(0, 0, 0, .7)); }
#s-hero .display > span { display: block; width: max-content; }
/* 白字 + 一圈深色描边，压在视频上也一眼分得清；不加发光、不加色块，只有「数字化」带动效 */
#s-hero .display .l1, #s-hero .display .l2, #s-hero .display .l3 { -webkit-text-stroke: 6px rgba(3, 6, 14, .9); paint-order: stroke fill; }
#s-hero .yr { color: var(--lb); }
#s-hero .yr .dg i b { -webkit-text-stroke: 0 !important; color: var(--lb); }
#s-hero .sub .em { text-shadow: 0 1px 2px #000, 0 0 10px rgba(0, 0, 0, .9); font-weight: 900; font-size: 1.2em; letter-spacing: .1em; margin-right: .14em; color: var(--lb, #a9e4ff); }
/* 第一行「2027 创造」统一小一号；「数字化」独占一行 */
#s-hero .l1 { font-size: .46em; letter-spacing: .08em; }
#s-hero .l1 .yr { font-size: 1.12em; margin: 0 .22em 0 0; }
#s-hero .l1 .cz { letter-spacing: .14em; }

/* 「2027 创造 ——」「数字化」「—— 学习空间」：上下两道淡蓝破折号把数字化框在中间。
   标题宽度只由「数字化」决定（第一、三行 width:0 + min-width:100%，不参与撑宽），第一行的破折号自动伸到数字化的右边缘，第三行的破折号从数字化的左边缘起笔 */
#s-hero .display { width: max-content; }
#s-hero .display > .l1, #s-hero .display > .l3 { width: 0; min-width: 100%; white-space: nowrap; clip-path: none; }
#s-hero .display > .l1 { display: flex; align-items: center; }
#s-hero .l1::after { content: ""; flex: 1 1 auto; min-width: .8em; margin-left: .55em; height: 2px; background: var(--lb); box-shadow: 0 0 0 1px rgba(3, 6, 14, .6), 0 0 10px rgba(169, 228, 255, .45); }
#s-hero .l2 { font-size: 1.32em; line-height: 1.08; margin: .02em 0; }
/* 「数字化」往右挪半个字；「学习空间」挪它的一半（.4714em × .7 = .25em × 1.32） */
#s-hero .display > .l2 { padding-left: .5em; }
#s-hero .display > .l3 { padding-left: .4714em; }
/* 「学习空间」放在破折号的下方，字间距和「创造」一致 */
#s-hero .display > .l3 { display: flex; flex-direction: column; align-items: flex-start; gap: .28em; font-size: .7em; letter-spacing: .092em; color: #e6ecf7; margin-top: .12em; }   /* .092em × .7 = .14em × .46：和「创造」的字间距实际一样宽 */
#s-hero .l3::before { content: ""; flex: none; width: 2.2em; height: 2px; background: var(--lb); box-shadow: 0 0 0 1px rgba(3, 6, 14, .6), 0 0 10px rgba(169, 228, 255, .45); }
/* 数字化革命：发光描边按钮 */
#s-hero .btn.rev { position: relative; color: #fff; background: linear-gradient(120deg, rgba(40, 70, 140, .55), rgba(110, 60, 160, .55)); border: 1px solid transparent; background-clip: padding-box; box-shadow: 0 0 0 1px rgba(159, 233, 255, .55), 0 0 22px -4px rgba(159, 233, 255, .6); gap: 10px; }
#s-hero .btn.rev .rv-dot { width: 8px; height: 8px; border-radius: 50%; background: #9fe9ff; box-shadow: 0 0 10px #9fe9ff; animation: rvdot 1.8s ease-in-out infinite; }
@keyframes rvdot { 50% { opacity: .25; transform: scale(.6); } }
#s-hero .btn.rev:hover { box-shadow: 0 0 0 1px #fff, 0 0 30px -2px rgba(159, 233, 255, .9); }
#s-hero .yr .dg i b, #s-hero .dgt { -webkit-text-stroke: 0 !important; }
/* 2027：数字像计数器一样滚到位 */
#s-hero .yr { display: inline-flex; margin: 0 .12em; font-family: var(--latin); font-weight: 700; letter-spacing: -.02em; vertical-align: top; }
#s-hero .yr .dg { display: inline-block; height: 1.16em; overflow: hidden; }
#s-hero .yr .dg i { display: flex; flex-direction: column; font-style: normal; transition: transform 2s var(--ease); transition-delay: calc(var(--k) * .18s + .5s); }
#s-hero .yr .dg i b { height: 1.16em; font-weight: 700; }
/* 2027 直接渐显，不再像计数器那样滚动 */
#s-hero .yr .dg i { transform: translateY(calc(var(--n) * -1.16em)); transition: none; }
/* 数字化：字形由不断跳动的数字拼成（home.js 画在 canvas 上），原文字只保留占位和无障碍朗读 */
#s-hero .dgt { position: relative; display: inline-block; color: transparent; -webkit-text-fill-color: transparent; }
#s-hero .dgt .dcv { position: absolute; left: -3%; top: -3%; width: 106%; height: 106%; pointer-events: none; filter: drop-shadow(0 0 1.5px #000) drop-shadow(0 0 1.5px #000) drop-shadow(0 0 3px rgba(0, 0, 0, .9)) drop-shadow(0 0 14px rgba(150, 225, 255, .7)); animation: dglow 5s ease-in-out infinite; }
@keyframes dglow { 50% { filter: drop-shadow(0 0 1.5px #000) drop-shadow(0 0 1.5px #000) drop-shadow(0 0 3px rgba(0, 0, 0, .9)) drop-shadow(0 0 16px rgba(95, 244, 255, .7)); } }
#s-hero .dgt .scan { position: absolute; left: -4%; right: -4%; height: 2px; top: 0; background: linear-gradient(90deg, transparent, #ffffff, transparent); box-shadow: 0 0 14px rgba(230, 236, 245, .9); opacity: 0; }
#s-hero .dgt .scan { transition: opacity .3s; }   /* 位置由 home.js 每帧设置，和数字的变色同步 */
@keyframes scan { 0% { top: 8%; opacity: 0; } 15% { opacity: 1; } 70% { opacity: .8; } 100% { top: 92%; opacity: 0; } }
#s-hero .cta { position: relative; z-index: 3; margin-top: clamp(20px, 4vh, 40px); padding-left: .2em; }
#s-hero .sub { font-size: clamp(15px, 1.2vw, 18px); color: #d4d7e4; text-shadow: 0 1px 2px #000, 0 0 10px rgba(0, 0, 0, .9); margin: 0 0 22px; min-height: 1.8em; letter-spacing: .08em; }
#s-hero .actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-start; }
html.flow #s-hero > .in { margin-top: 0; }
#s-hero .ctl { position: absolute; right: clamp(16px, 3vw, 44px); bottom: 110px; display: flex; flex-direction: column; gap: 12px; z-index: 3; }
#s-hero .ctl button { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line2); display: grid; place-items: center; font-size: 12px; backdrop-filter: blur(6px); background: rgba(0, 0, 0, .2); transition: background .3s; }
#s-hero .ctl button:hover { background: rgba(255, 255, 255, .12); }
#s-hero .meta { position: absolute; left: 0; bottom: -120px; display: flex; gap: 28px; font: 500 11px var(--mono); letter-spacing: .25em; color: var(--dim); }

/* 1 理念：逐行出现 → 缩到左上角 → 品牌与数字依次出场 */
#s-belief .mf { transform-origin: 0 0; transition: transform 1.4s var(--ease2), opacity 1s; }
#s-belief .mf p { margin: 0; font: 900 clamp(30px, 4.6vw, 70px)/1.32 var(--serif); }
#s-belief .mf .pre { font: 500 clamp(14px, 1.2vw, 17px)/1 var(--sans); letter-spacing: .5em; color: var(--gold); margin-bottom: 26px; --ls: .5em; }
#s-belief .mf .k { color: transparent; background: linear-gradient(100deg, #fff, var(--sky) 60%, var(--gold)); -webkit-background-clip: text; background-clip: text; }
#s-belief.compact .mf { transform: translate(0, calc(var(--nav-h) + 14px - var(--mft, 30vh))) scale(.36); opacity: .7; }
#s-belief .brandline { position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-36%); text-align: left; }
#s-belief .brandline .name { display: block; font: 900 clamp(56px, 10vw, 168px)/1 var(--serif); letter-spacing: .02em; position: relative; overflow: hidden; }
#s-belief .brandline .name::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .6) 50%, transparent 70%); transform: translateX(-120%); mix-blend-mode: overlay; }
#s-belief .brandline .name.on::after { animation: sweep 2.4s .6s var(--ease) forwards; }
@keyframes sweep { to { transform: translateX(120%); } }
#s-belief .served { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; margin-top: 30px; }
#s-belief .served .lbl { font: 500 clamp(16px, 1.4vw, 20px) var(--sans); color: var(--mute); letter-spacing: .12em; }
#s-belief .served .big { font: 700 clamp(64px, 9vw, 150px)/.9 var(--latin); letter-spacing: -.03em; background: linear-gradient(180deg, #fff, #b9c2ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
#s-belief .served .unit { font: 900 clamp(18px, 1.8vw, 26px) var(--serif); }
#s-belief .minis { display: flex; gap: clamp(20px, 4vw, 60px); margin-top: 34px; flex-wrap: wrap; }
#s-belief .minis div { border-left: 1px solid var(--line2); padding-left: 18px; }
#s-belief .minis b { display: block; font: 700 clamp(28px, 2.8vw, 42px)/1.1 var(--latin); }
#s-belief .minis div > span { font-size: 13px; color: var(--mute); letter-spacing: .08em; }
html.flow #s-belief .brandline { position: static; transform: none; margin-top: 40px; }
html.flow #s-belief.compact .mf { transform: scale(.62); opacity: .8; margin-bottom: -7vh; }
html.flow #s-belief .brandline .name { font-size: min(13vw, 88px); white-space: nowrap; }

#s-belief .cm { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; transition: opacity 1.4s var(--ease), transform 1.8s var(--ease2), filter 1s; }
#s-belief.talk .cm.on { transform: translateX(30%) scale(.74); opacity: .55; }
#s-belief .cmcap { position: absolute; left: 50%; top: calc(var(--nav-h) + 4vh); transform: translateX(-50%); text-align: center; z-index: 1; --ls: .3em; transition: opacity 1s, letter-spacing 1.6s var(--ease), filter 1s, transform 1.4s var(--ease2); }
#s-belief .cmcap span { display: block; font: 900 clamp(20px, 2vw, 30px) var(--serif); }
#s-belief .cmcap small { display: block; margin-top: 8px; font: 500 12px var(--sans); color: var(--mute); letter-spacing: .2em; }
#s-belief.talk .cmcap.on { opacity: 0; transform: translate(-50%, -20px); }
#s-belief > .in { z-index: 2; }
#s-belief .two { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
html.flow #s-belief .cm { position: relative; height: 56vw; max-height: 420px; }
html.flow #s-belief.talk .cm.on { transform: none; opacity: 1; }
html.flow #s-belief .cmcap { position: relative; left: auto; top: auto; transform: none; }
html.flow #s-belief.talk .cmcap.on { opacity: 1; transform: none; }

/* 2 证据：一个模型 → 多所院校真题 */
#s-proof .grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(30px, 6vw, 90px); align-items: center; margin-top: 34px; position: relative; }
#s-proof .model { padding: 26px; position: relative; z-index: 2; }
#s-proof .model .from { font: 500 12px var(--mono); letter-spacing: .15em; color: var(--gold); }
#s-proof .model h3 { font: 900 clamp(24px, 2.4vw, 34px)/1.3 var(--serif); margin: 10px 0 10px; }
#s-proof .model p { color: var(--mute); font-size: 14px; margin: 0 0 14px; line-height: 1.85; }
#s-proof .model .mcv { width: 100%; height: clamp(140px, 25vh, 230px); display: block; margin: 6px 0 10px; border-radius: 12px; background: radial-gradient(80% 90% at 50% 60%, rgba(120, 130, 255, .07), transparent); }
#s-proof .model svg * { fill: none; stroke: #dfe3ff; stroke-width: 1.6; stroke-linecap: round; }
#s-proof .model svg text { fill: #aab6ff; stroke: none; font: italic 15px Cambria, serif; }
#s-proof .model .eq { font: italic 22px Cambria, "Times New Roman", serif; color: #fff; padding: 10px 14px; border-radius: 12px; background: rgba(255, 255, 255, .04); border: 1px solid var(--line); display: inline-block; }
#s-proof .slips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; position: relative; z-index: 2; }
.slip { position: relative; padding: 16px 18px; border-radius: 14px; background: #f2efe6; color: #1d1d27; box-shadow: 0 20px 40px -20px #000; transform-origin: 50% 0; }
.slip:nth-child(odd) { rotate: -1.2deg; } .slip:nth-child(even) { rotate: 1deg; }
.slip b { font: 900 17px var(--serif); display: block; }
.slip .y { font: 600 12px var(--mono); color: #6b5d3c; }
.slip p { margin: 6px 0 0; font-size: 12.5px; color: #4a4a58; }
.slip .st { position: absolute; right: 12px; top: 12px; border: 1.5px solid #b44; color: #b44; font-size: 10.5px; padding: 0 6px; border-radius: 3px; transform: rotate(8deg); }
#s-proof .threads { position: absolute; inset: 0; z-index: 1; pointer-events: none; overflow: visible; }
#s-proof .threads path { fill: none; stroke: rgba(216, 195, 154, .5); stroke-width: 1; stroke-dasharray: 4 5; }
#s-proof .sum { display: flex; align-items: baseline; gap: 12px; margin-top: 26px; font: 900 clamp(18px, 1.6vw, 22px) var(--serif); flex-wrap: wrap; }
#s-proof .sum b { font: 700 clamp(34px, 3.2vw, 48px)/1 var(--latin); color: var(--gold); }
#s-proof .mtabs { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
@media (max-width: 900px) { #s-proof .grid { grid-template-columns: minmax(0, 1fr); } #s-proof .threads { display: none; } }
@media (max-height: 820px) { #s-proof .h2 { font-size: clamp(26px, 3.4vw, 46px); } #s-proof .grid { margin-top: 18px; } #s-proof .model { padding: 18px 22px; } #s-proof .model h3 { margin: 6px 0; } #s-proof .model p { margin-bottom: 6px; font-size: 13px; line-height: 1.7; } #s-proof .sum { margin-top: 14px; } #s-proof .mtabs { margin-top: 10px; } .slip { padding: 12px 16px; } }

/* 3 教辅：背景是内页，前面是书 */
#s-book .pages { position: absolute; inset: -6%; z-index: 0; pointer-events: none; perspective: 1400px; transition: transform 1.2s var(--ease); }
#s-book .pages img { position: absolute; width: clamp(150px, 15vw, 260px); border-radius: 4px; box-shadow: 0 30px 60px -20px #000; opacity: 0; filter: saturate(.35) brightness(.75) contrast(1.1); transition: opacity 2s var(--ease), transform 2.4s var(--ease); animation: drift var(--d, 18s) ease-in-out infinite alternate; }
#s-book .pages.on img { opacity: var(--o, .16); }
@keyframes drift { from { translate: 0 0; } to { translate: var(--dx, 20px) var(--dy, -30px); } }
#s-book .pages::after { content: ""; position: absolute; inset: 0; background: radial-gradient(55% 60% at 40% 50%, rgba(3, 4, 9, .7), rgba(3, 4, 9, .25) 75%, rgba(3, 4, 9, .6)); }
#s-book > .in { z-index: 2; }
#s-book .stage { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(30px, 6vw, 90px); align-items: center; margin-top: 30px; }
.cover3d { position: relative; z-index: 5; justify-self: center; width: min(340px, 62vw, calc((100vh - 340px) * .72)); aspect-ratio: 707/1000; perspective: 1400px; }
.cover3d .book { position: absolute; inset: 0; transform-style: preserve-3d; animation: float 6s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0) rotateY(-16deg) rotateX(4deg); } 50% { transform: translateY(-16px) rotateY(-9deg) rotateX(2deg); } }
.cover3d img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border-radius: 3px 9px 9px 3px; box-shadow: 30px 50px 90px -24px rgba(0, 0, 0, .95), 0 0 0 1px rgba(255, 255, 255, .06); transition: opacity .5s, transform .9s var(--ease); }
.cover3d img.out { opacity: 0; transform: translateX(-40px) rotateY(30deg); }
.cover3d .book::after { content: ""; position: absolute; inset: 0; border-radius: 3px 9px 9px 3px; background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .16) 45%, transparent 60%); pointer-events: none; }
.cover3d .glow { position: absolute; left: 8%; right: 8%; bottom: -10%; height: 36px; border-radius: 50%; background: radial-gradient(rgba(170, 182, 255, .35), transparent 70%); filter: blur(12px); }
.cover3d .ring { position: absolute; inset: -20%; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .07); animation: spin 50s linear infinite; }
.cover3d .ring::before { content: ""; position: absolute; top: 14%; left: 14%; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 14px var(--gold); }
@keyframes spin { to { transform: rotate(360deg); } }
#s-book .h2 .more { display: block; font-size: .56em; color: var(--mute); letter-spacing: .12em; margin-top: 6px; }
.cover3d .bkarr { position: absolute; top: 50%; z-index: 3; width: 52px; height: 52px; margin-top: -26px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .28); background: rgba(6, 8, 18, .55); backdrop-filter: blur(8px); font: 300 30px/1 var(--latin); color: #fff; display: grid; place-items: center; padding-bottom: 4px; transition: background .3s, transform .4s var(--ease), border-color .3s; animation: nudge 2.4s ease-in-out infinite; }
.cover3d .bkarr.prev { left: -78px; --nx: -5px; } .cover3d .bkarr.next { right: -78px; --nx: 5px; }
.cover3d .bkarr:hover { background: #fff; color: #07080f; border-color: #fff; }
@keyframes nudge { 50% { transform: translateX(var(--nx)); } }
@media (max-width: 900px) { .cover3d .bkarr.prev { left: -58px; } .cover3d .bkarr.next { right: -58px; } }
#s-book .info .series { display: flex; align-items: center; gap: 14px; }
#s-book .info h3 { font: 900 clamp(30px, 3.6vw, 52px)/1.15 var(--serif); margin: 18px 0 14px; }
#s-book .info .tl { font-size: 16.5px; color: #c9ccdc; margin: 0 0 24px; line-height: 1.85; min-height: 3.7em; }
#s-book .info .pts { display: grid; gap: 12px; margin-bottom: 24px; }
#s-book .info .pts div { padding-left: 16px; border-left: 1px solid var(--gold); }
#s-book .info .pts b { font: 900 16px var(--serif); display: block; }
#s-book .info .pts span { font-size: 13.5px; color: var(--mute); }
#s-book .info .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
#s-book .info .actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
#s-book .thumbs { display: flex; gap: 10px; margin-top: 34px; overflow-x: auto; padding: 8px 2px; scrollbar-width: none; }
#s-book .thumbs::-webkit-scrollbar { display: none; }
#s-book .thumbs button { position: relative; flex: none; width: 64px; opacity: .4; transition: opacity .4s, transform .5s var(--ease); }
#s-book .thumbs button img { width: 100%; aspect-ratio: 707/1000; object-fit: cover; border-radius: 3px; }
#s-book .thumbs button.on { opacity: 1; transform: translateY(-6px); }
#s-book .thumbs button i { position: absolute; left: 0; right: 0; bottom: -8px; height: 2px; background: var(--line); overflow: hidden; }
#s-book .thumbs button.on i::after { content: ""; position: absolute; inset: 0; background: var(--gold); transform-origin: left; animation: fill 7s linear forwards; }
@keyframes fill { from { transform: scaleX(0); } }
@media (max-width: 900px) { #s-book .stage { grid-template-columns: minmax(0, 1fr); } .cover3d { width: min(250px, 60vw); } }

/* 4 刷题 */
#s-practice .grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(30px, 6vw, 90px); align-items: center; }
#s-practice .story p { margin: 0; }
#s-practice .story .a { font: 500 clamp(16px, 1.4vw, 20px) var(--sans); color: var(--mute); letter-spacing: .1em; }
#s-practice .story .b { font: 900 clamp(34px, 4.4vw, 66px)/1.25 var(--serif); margin-top: 10px; }
#s-practice .story .c2 { font: 900 clamp(34px, 4.4vw, 66px)/1.25 var(--serif); }
#s-practice .feats { display: flex; flex-wrap: wrap; gap: 10px 12px; margin: 30px 0; }
#s-practice .feats span { font-size: clamp(15px, 1.05vw, 19px); padding: 9px 18px; border-radius: 99px; border: 1px solid rgba(255, 255, 255, .22); background: rgba(255, 255, 255, .05); color: #eef0f8; }
.qm { position: relative; padding: 28px; }
.qm .top { display: flex; justify-content: space-between; font-size: 12px; color: var(--mute); margin-bottom: 16px; }
.qm .stem { font-size: 16.5px; line-height: 1.85; margin-bottom: 18px; min-height: 3.7em; }
.qm .opt { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 12px; border: 1px solid var(--line); margin-bottom: 9px; position: relative; overflow: hidden; isolation: isolate; font-size: 14.5px; transition: border-color .5s; }
.qm .opt b { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font: 600 11px var(--latin); background: rgba(255, 255, 255, .08); flex: none; transition: all .5s; }
.qm .opt .bar { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: rgba(170, 182, 255, .12); z-index: -1; transition: width 1.4s var(--ease); }
.qm .opt em { margin-left: auto; font: 500 12px var(--mono); color: var(--mute); font-style: normal; opacity: 0; transition: opacity .6s; }
.qm.res .opt em { opacity: 1; }
.qm.res .opt.right { border-color: rgba(111, 227, 176, .6); } .qm.res .opt.right b { background: var(--ok); color: #03200f; }
.qm .react { display: flex; gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.qm .react span { display: inline-flex; gap: 6px; height: 32px; align-items: center; padding: 0 13px; border-radius: 99px; background: rgba(255, 255, 255, .05); font-size: 13px; }
.qm .bub { position: absolute; padding: 14px 18px; border-radius: 18px 18px 18px 5px; background: var(--pill); color: #07080f; font-size: 15px; max-width: 290px; box-shadow: 0 24px 50px -14px #000; line-height: 1.65; z-index: 3; }
.qm .bub small { display: block; color: #6b6e85; font-size: 12px; margin-bottom: 2px; }
/* 评论气泡：从下方缓缓浮起、放大，然后轻轻漂浮 */
[data-fx="bubble"] { opacity: 0; transform: translateY(40px) scale(.6); filter: blur(6px); transform-origin: 20% 100%; transition: opacity 1.6s var(--ease), transform 2.2s cubic-bezier(.2, 1.3, .3, 1), filter 1.4s; }
[data-fx="bubble"].on { animation: bobble 5s 2.2s ease-in-out infinite; }
@keyframes bobble { 50% { translate: 0 -8px; } }
button.opt { width: 100%; text-align: left; font: inherit; color: inherit; cursor: pointer; }
.qm .opt .mk { font: 700 16px var(--latin); font-style: normal; width: 18px; text-align: center; margin-left: auto; }
.qm .opt .mk + em { margin-left: 10px; }
.qm.res .opt.right .mk { color: var(--ok); } .qm.res .opt.wrong .mk { color: var(--bad); }
.qm.res .opt.wrong { border-color: rgba(255, 133, 151, .6); } .qm.res .opt.wrong b { background: var(--bad); color: #2a0610; }
.qm .opt.sel { box-shadow: 0 0 0 1px rgba(255, 255, 255, .4) inset; }
.qm .opt:hover { border-color: var(--line2); }
.qm .verd { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: 13.5px; color: var(--mute); margin-top: 6px; opacity: 0; transform: translateY(10px); transition: opacity .6s, transform .8s var(--ease); min-height: 30px; }
.qm .verd.on { opacity: 1; transform: none; }
.qm .verd b { color: #fff; }
.qm .verd .vt { font: 900 16px var(--serif); } .qm .verd .vt.ok { color: var(--ok); } .qm .verd .vt.no { color: var(--bad); }
.qm .verd .rk { display: inline-flex; gap: 6px; align-items: baseline; padding: 4px 12px; border-radius: 99px; border: 1px solid rgba(216, 195, 154, .4); background: rgba(216, 195, 154, .06); color: #e9e2cf; }
.qm .verd .rk i { font-style: normal; font-size: 11px; color: var(--gold); letter-spacing: .15em; }
.qm .verd .rk .hs { letter-spacing: 1px; color: #f2c6cf; font-size: 13px; }
.qm .verd .rk em { font: 700 14px var(--latin); font-style: normal; } .qm .verd .rk em.up { color: var(--ok); } .qm .verd .rk em.dn { color: var(--bad); }
#s-practice .pname { margin: 18px 0 0 !important; font: 900 clamp(46px, 5.6vw, 92px)/1.05 var(--serif); letter-spacing: .04em; color: transparent; background: linear-gradient(100deg, #9fe9ff, #b9a8ff 30%, var(--gold) 55%, #9fe9ff 80%); background-size: 220% 100%; -webkit-background-clip: text; background-clip: text; animation: hue 6s linear infinite; }
@keyframes hue { to { background-position: -220% 0; } }
#s-practice .lead .hl { background: linear-gradient(100deg, #9fe9ff, var(--gold)); -webkit-background-clip: text; background-clip: text; color: transparent; font-weight: 700; font-size: 1.15em; }
#s-practice .rankline { margin-top: 18px !important; font: 900 clamp(17px, 1.5vw, 22px)/1.6 var(--serif); }
#s-practice .rankline b { color: var(--gold); }
#s-practice .rankline small { display: block; font: 13px/1.7 var(--sans); color: var(--mute); margin-top: 4px; }
@media (max-width: 900px) { #s-practice .grid { grid-template-columns: minmax(0, 1fr); } .qm .bub { position: relative; left: auto !important; right: auto !important; top: auto !important; bottom: auto !important; margin-top: 10px; } }

/* 5 院校：地图 → 星空 */
#s-stars .mapcv { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }
#s-stars > .in { pointer-events: none; z-index: 2; align-self: stretch; display: flex; flex-direction: column; justify-content: space-between; padding-bottom: 60px; height: 100%; }
#s-stars > .in a, #s-stars > .in button { pointer-events: auto; }
#s-stars .line2 { font: 500 clamp(15px, 1.3vw, 18px) var(--sans); color: var(--mute); letter-spacing: .12em; margin-top: 16px; min-height: 1.6em; }
#s-stars .bottom { display: flex; justify-content: space-between; align-items: end; gap: 20px; flex-wrap: wrap; }
#s-stars .legend { font-size: 12px; color: var(--mute); display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.stip { position: absolute; z-index: 5; pointer-events: none; padding: 16px 18px; border-radius: 16px; background: rgba(243, 243, 246, .97); color: #07080f; font-size: 12.5px; width: 270px; transform: translate(-50%, calc(-100% - 22px)); opacity: 0; transition: opacity .25s; box-shadow: 0 20px 40px -10px #000; line-height: 1.6; }
.stip.below { transform: translate(-50%, 0); }
.stip > b { font: 900 19px var(--serif); display: block; }
.stip .loc { color: #4a4d63; margin-top: 2px; } .stip .loc i { font-style: normal; font-weight: 700; color: #07080f; padding: 0 7px; border-radius: 99px; background: #e8e3d4; }
.stip .ex { display: grid; grid-template-columns: 1fr 1fr; gap: 3px 10px; margin-top: 10px; padding-top: 10px; border-top: 1px solid #dcdce4; }
.stip .ex small, .stip .ln small { grid-column: 1 / -1; color: #8a8c9e; font-size: 11px; letter-spacing: .1em; }
.stip .ex span { font-size: 12px; }
.stip .ln { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-top: 10px; padding-top: 10px; border-top: 1px solid #dcdce4; }
.stip .ln small { width: 100%; }
.stip .ln b { font: 700 26px/1 var(--latin); }
.stip .ln .demo-badge { color: #8a6d2c; border-color: #c9b07a; }
.stip.on { opacity: 1; }

/* 6 课程阶段（真实课程体系） */
#s-stage .cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 36px; }
.stg { position: relative; padding: 28px 26px 24px; border-radius: 22px; overflow: hidden; }
.stg .no { font: 700 64px/1 var(--latin); color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, .14); position: absolute; right: 18px; top: 14px; }
.stg .ic { font: 500 11px var(--mono); letter-spacing: .25em; color: var(--gold); }
.stg h3 { font: 900 30px/1.2 var(--serif); margin: 10px 0 4px; }
.stg .when { font: 600 14px var(--latin); color: #c9cde0; }
.stg ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.stg li { font-size: 14px; line-height: 1.7; padding-left: 14px; border-left: 1px solid var(--line2); }
.stg li em { display: block; font: 600 12px var(--latin); color: var(--gold); font-style: normal; margin-top: 2px; }
.stg .hours { margin-top: 20px; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .06); overflow: hidden; }
.stg .hours i { display: block; height: 100%; width: 0; border-radius: 4px; background: linear-gradient(90deg, var(--sky), var(--gold)); transition: width 1.6s var(--ease); }
.stg.on .hours i { width: var(--w); }
#s-stage .tot { margin-top: 28px; display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; font: 900 20px var(--serif); }
#s-stage .tot b { font: 700 48px/1 var(--latin); }
#s-stage .h2 .g2 { color: var(--gold); }
#s-stage .cards { margin-top: 26px; }
#s-stage .stg { padding: 22px 24px 20px; }
#s-stage .stg ul { margin-top: 14px; gap: 10px; }
#s-stage .svcs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 14px; }
#s-stage .svc { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 2px 12px; align-items: center; padding: 14px 16px; border-radius: 16px; border: 1px solid var(--line); background: rgba(255, 255, 255, .025); }
#s-stage .svc i { grid-row: span 2; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font: 700 15px var(--latin); font-style: normal; color: #07080f; background: linear-gradient(135deg, #9fe9ff, var(--gold)); }
#s-stage .svc b { font: 900 16px var(--serif); }
#s-stage .svc span { font-size: 12.5px; color: var(--mute); line-height: 1.55; }
#s-stage .tot { margin-top: 18px; }
@media (max-height: 860px) { #s-stage .stg li { font-size: 13px; } #s-stage .stg .no { font-size: 48px; } #s-stage .tot b { font-size: 38px; } }
@media (max-width: 900px) { #s-stage .cards { grid-template-columns: minmax(0, 1fr); } #s-stage .svcs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* 7 学员 */
#s-alumni .q { max-width: 980px; margin-top: 30px; min-height: 230px; }
#s-alumni .q blockquote { margin: 0; font: 900 clamp(24px, 2.8vw, 40px)/1.55 var(--serif); }
#s-alumni .q .who { display: flex; gap: 18px; align-items: baseline; margin-top: 22px; flex-wrap: wrap; }
#s-alumni .q .who b { font: 900 22px var(--serif); }
#s-alumni .q .who span { color: var(--mute); font-size: 14px; }
#s-alumni .q .who .sc { font: 700 40px/1 var(--latin); color: var(--gold); }
#s-alumni .row { display: flex; gap: 12px; margin-top: 40px; overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
#s-alumni .row .tr { display: flex; gap: 12px; animation: marquee 60s linear infinite; }
@keyframes marquee { to { transform: translateX(-50%); } }
#s-alumni .row .o { flex: none; padding: 14px 18px; border-radius: 14px; border: 1px solid var(--line); background: rgba(255, 255, 255, .02); display: flex; gap: 14px; align-items: baseline; white-space: nowrap; }
#s-alumni .arch { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 30px; }
#s-alumni .row .o b { font: 900 16px var(--serif); } #s-alumni .row .o span { font: 700 18px var(--latin); color: var(--gold); } #s-alumni .row .o small { color: var(--dim); }

/* 8 结尾 */
#s-end .display { font-size: clamp(40px, 6.6vw, 100px); }
#s-end .vlabel { margin: 40px 0 0; font: 900 clamp(18px, 1.6vw, 22px) var(--serif); display: flex; align-items: baseline; gap: 14px; }
#s-end .vlabel span { font: 500 11px var(--mono); letter-spacing: .2em; color: var(--gold); }
#s-end .vids { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
#s-end .vid { display: block; border-radius: 14px; overflow: hidden; background: #0b0c14; border: 1px solid var(--line); }
#s-end .vid img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform 1s var(--ease); }
#s-end .vid:hover img { transform: scale(1.05); }
#s-end .vid p { margin: 0; padding: 10px 12px 12px; font-size: 12.5px; color: #c9ccdc; line-height: 1.55; }
#s-end .vid small { display: block; color: var(--dim); margin-top: 2px; }
#s-end .mini { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; color: var(--dim); }
#s-end .mini nav { display: flex; gap: 20px; flex-wrap: wrap; } #s-end .mini a:hover { color: #fff; }
@media (max-width: 900px) { #s-end .vids { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
#s-book .thumbs { max-width: 44%; margin-top: 22px; }
@media (max-height: 860px) { #s-book .stage { margin-top: 14px; } #s-book .thumbs button { width: 46px; } #s-book .info .tl { margin-bottom: 16px; } #s-book .info .pts { margin-bottom: 16px; gap: 8px; } #s-book .info .tags { margin-bottom: 18px; } }
@media (max-width: 900px) { #s-book .thumbs { max-width: none; } }

/* 刷题：矮屏压缩 */
@media (max-height: 900px) {
  #s-practice .story .b, #s-practice .story .c2 { font-size: clamp(28px, 3.2vw, 48px); }
  #s-practice .pname { font-size: clamp(40px, 4.4vw, 66px); margin-top: 10px !important; }
  #s-practice .lead { font-size: 14px; line-height: 1.75; }
  #s-practice .feats { margin: 14px 0; gap: 6px; } #s-practice .feats span { padding: 6px 13px; font-size: 14px; }
  #s-practice .rankline { margin-top: 10px !important; font-size: 17px; } #s-practice .rankline small { display: none; }
  #s-practice .story .btn { margin-top: 14px; }
  .qm { padding: 22px; } .qm .stem { margin-bottom: 12px; min-height: 0; } .qm .opt { padding: 8px 12px; margin-bottom: 7px; }
}

/* 矮屏（≤ 820px 高）：各屏再紧凑一些，保证一屏放得下 */
@media (max-height: 820px) {
  #s-proof .model .mcv { height: clamp(110px, 19vh, 200px); } #s-proof .h2 { font-size: clamp(24px, 3vw, 40px); margin-top: 10px; } #s-proof .grid { margin-top: 12px; } #s-proof .model .eq { font-size: 18px; padding: 6px 12px; } #s-proof .sum b { font-size: 34px; }
  #s-proof .model p { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .slip p { display: none; } #s-proof .slips { gap: 10px; }
  #s-book .h2 { font-size: clamp(26px, 3.2vw, 44px); margin-top: 10px; } #s-book .h2 .more { display: inline; margin: 0 0 0 .5em; }
  #s-book .stage { margin-top: 6px; } .cover3d { width: min(250px, calc((100vh - 360px) * .72)); }
  #s-book .info h3 { font-size: clamp(24px, 2.6vw, 38px); margin: 10px 0 8px; } #s-book .info .tl { min-height: 0; font-size: 14.5px; }
  #s-book .info .pts div:nth-child(n+3) { display: none; } #s-book .thumbs { margin-top: 8px; }
  #s-stage .h2 { font-size: clamp(26px, 3.4vw, 46px); margin-top: 10px; } #s-stage .cards { margin-top: 16px; } #s-stage .stg h3 { font-size: 24px; }
  #s-stage .stg .hours { margin-top: 12px; } #s-stage .svc { padding: 10px 14px; } #s-stage .tot { margin-top: 12px; }
  #s-alumni .q { min-height: 170px; margin-top: 18px; } #s-alumni .q blockquote { font-size: clamp(20px, 2.2vw, 30px); } #s-alumni .row { margin-top: 20px; } #s-alumni .arch { margin-top: 18px; }
  #s-end .display { font-size: clamp(36px, 5vw, 72px); } #s-end .vlabel { margin-top: 22px; } #s-end .mini { margin-top: 22px; } #s-end .vid p { padding: 8px 10px; font-size: 12px; }
}

/* 首页刷题：排位段位单独一行，金色奖杯 + 扫光 + 星光 */
#s-practice .rankfeat { display: flex; align-items: center; gap: 18px; margin: -6px 0 26px; }
#s-practice .trophy { position: relative; flex: none; width: clamp(70px, 6.4vw, 104px); aspect-ratio: 1; filter: drop-shadow(0 8px 18px rgba(0, 0, 0, .6)) drop-shadow(0 0 14px rgba(240, 200, 110, .35)); animation: tglow 6.5s ease-in-out infinite; }
#s-practice .trophy svg { width: 100%; height: 100%; overflow: visible; }
#s-practice .trophy .halo { transform-origin: 60px 54px; animation: thalo 6.5s ease-in-out infinite; }
#s-practice .trophy .sheen { animation: tsheen 6s cubic-bezier(.5, 0, .3, 1) infinite; }
#s-practice .trophy .sp { position: absolute; width: 14px; height: 14px; background: radial-gradient(circle, #fff 0 18%, transparent 20%), conic-gradient(from 45deg, transparent 0 10%, #fff3cf 12% 13%, transparent 15% 35%, #fff3cf 37% 38%, transparent 40% 60%, #fff3cf 62% 63%, transparent 65% 85%, #fff3cf 87% 88%, transparent 90%); border-radius: 50%; opacity: 0; animation: tspark 4.2s ease-in-out infinite; }
#s-practice .trophy .s1 { left: 6%; top: 8%; } #s-practice .trophy .s2 { right: 4%; top: 30%; width: 10px; height: 10px; animation-delay: 1.4s; } #s-practice .trophy .s3 { left: 18%; bottom: 14%; width: 9px; height: 9px; animation-delay: 2.8s; }
@keyframes tsheen { 0%, 35% { transform: skewX(-18deg) translateX(0); } 75%, 100% { transform: skewX(-18deg) translateX(170px); } }
@keyframes tglow { 50% { filter: drop-shadow(0 8px 18px rgba(0, 0, 0, .6)) drop-shadow(0 0 26px rgba(255, 214, 120, .65)); } }
@keyframes thalo { 50% { transform: scale(1.12); opacity: .7; } }
@keyframes tspark { 0%, 100% { opacity: 0; transform: scale(.3) rotate(0); } 45% { opacity: 1; transform: scale(1) rotate(45deg); } }
#s-practice .rankfeat .rt { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
#s-practice .rankfeat small { font: 500 13px var(--sans); color: var(--mute); letter-spacing: .1em; }
#s-practice .rankfeat b { font: 900 clamp(32px, 3.4vw, 54px)/1.15 var(--serif); letter-spacing: .06em; color: transparent; background: linear-gradient(100deg, #8a5d17 0%, #f0cf7a 22%, #fff6d8 32%, #d9a842 46%, #8a5d17 60%, #f3d68b 78%, #fff6d8 86%, #b8862b 100%); background-size: 240% 100%; -webkit-background-clip: text; background-clip: text; animation: goldtext 11s linear infinite; filter: drop-shadow(0 0 14px rgba(240, 200, 110, .3)); }
@keyframes goldtext { to { background-position: -240% 0; } }
#s-practice .rankfeat em { font: 13px/1.7 var(--sans); font-style: normal; color: var(--mute); max-width: 460px; }
@media (max-height: 820px) { #s-practice .rankfeat { margin: -4px 0 14px; } #s-practice .rankfeat em { display: none; } #s-practice .trophy { width: 66px; } }

/* 课程：服务卡片前的引导语；「查看班型」放大 */
#s-stage .svclead { margin: 20px 0 0; font: 900 clamp(17px, 1.5vw, 22px) var(--serif); letter-spacing: .1em; color: var(--gold); }
#s-stage .tot .link-arrow { font: 700 clamp(17px, 1.4vw, 21px) var(--serif); letter-spacing: .14em; gap: 14px; padding: 8px 10px 8px 22px; border-radius: 99px; border: 1px solid rgba(216, 195, 154, .45); background: rgba(216, 195, 154, .08); }
#s-stage .tot .link-arrow i { width: 48px; height: 48px; font-size: 20px; border-color: rgba(216, 195, 154, .6); }
#s-stage .tot .link-arrow:hover { background: rgba(216, 195, 154, .16); }
#s-hero .btn.rev:hover { color: #07080f; }