@charset "UTF-8";

:root {
	--ink: #17222d;
	--muted: #6c7880;
	--green: #19bf70;
	--green-dark: #0c9457;
	--line: #e3e8e8;
	--paper: #f5f8f7;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
.book-shell { width: min(1180px, calc(100% - 56px)); margin: 0 auto; }

.book-header { position: relative; z-index: 4; height: 100px; background: #fff; border-bottom: 1px solid #edf0ef; }
.book-header-inner { display: flex; align-items: center; width: min(1200px, calc(100% - 56px)); height: 100%; margin: 0 auto; }
.book-logo { display: block; width: 150px; flex: 0 0 auto; }
.book-logo img { display: block; width: 100%; height: auto; }
.book-nav { display: flex; align-self: stretch; align-items: center; gap: 34px; margin-left: auto; font-size: 16px; }
.book-nav a { position: relative; display: flex; align-items: center; align-self: stretch; color: #333; white-space: nowrap; transition: color .2s ease; }
.book-nav a:after { content: ""; position: absolute; right: 0; bottom: -1px; left: 0; height: 3px; background: var(--green); transform: scaleX(0); transform-origin: center; transition: transform .24s ease; }
.book-nav a:hover, .book-nav a.active { color: #08c765; }
.book-nav a:hover:after, .book-nav a.active:after { transform: scaleX(1); }
.book-nav-arrow { width: 7px; height: 7px; margin-left: 7px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: translateY(-2px) rotate(45deg); }

.book-hero { position: relative; min-height: 690px; overflow: hidden; color: #fff; background: #18242c; }
.hero-photo, .hero-overlay { position: absolute; inset: 0; }
.hero-photo { background: url("../images/20230714etrgsdfgh.png") center 43% / cover no-repeat; transform: scale(1.02); }
.hero-overlay { background: linear-gradient(90deg, rgba(8,17,24,.93) 0%, rgba(8,17,24,.72) 42%, rgba(8,17,24,.2) 100%); }
.hero-content { position: relative; z-index: 1; padding-top: 120px; }
.eyebrow, .section-kicker { margin: 0; color: var(--green); font-size: 12px; font-weight: bold; letter-spacing: 1.5px; }
.eyebrow span { margin-left: 14px; color: rgba(255,255,255,.6); font-size: 11px; font-weight: normal; letter-spacing: .6px; }
.hero-content h1 { margin: 28px 0 18px; font-size: clamp(42px, 5vw, 70px); line-height: 1.16; font-weight: 300; letter-spacing: 0; }
.hero-content h1 strong { font-weight: 700; }
.hero-description { max-width: 470px; margin: 0; color: rgba(255,255,255,.74); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; align-items: flex-start; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 47px; padding: 0 22px; font-size: 14px; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button span { margin-left: 22px; font-size: 18px; line-height: 1; }
.button-primary { color: #10231a; background: var(--green); }
.button-primary:hover { background: #46d58f; }
.button-ghost { color: #fff; border: 1px solid rgba(255,255,255,.5); }
.button-ghost:hover { border-color: var(--green); background: rgba(25,191,112,.12); }
.hero-proof { display: flex; gap: 0; margin-top: 86px; }
.hero-proof span { min-width: 150px; padding-right: 28px; margin-right: 27px; border-right: 1px solid rgba(255,255,255,.25); }
.hero-proof span:last-child { border-right: 0; }
.hero-proof b, .hero-proof small { display: block; }
.hero-proof b { font-size: 16px; font-weight: normal; }
.hero-proof small { margin-top: 8px; color: rgba(255,255,255,.53); font-size: 12px; }
.hero-scroll { position: absolute; z-index: 1; bottom: 33px; right: max(28px, calc((100% - 1180px) / 2)); display: flex; align-items: center; gap: 13px; color: rgba(255,255,255,.65); font-size: 11px; writing-mode: vertical-rl; }
.hero-scroll span { display: block; width: 1px; height: 48px; background: var(--green); }

.book-intro { padding: 105px 0 108px; background: var(--paper); }
.intro-layout { display: grid; grid-template-columns: 1fr 2.2fr 160px; gap: 42px; align-items: start; }
.intro-layout h2, .section-heading h2, .scenario-layout h2, .contact-layout h2 { margin: 18px 0 0; font-size: 39px; line-height: 1.35; font-weight: 300; letter-spacing: 0; }
h2 em { color: var(--green-dark); font-style: normal; font-weight: 700; }
.intro-text { max-width: 610px; margin: 29px 0 0; color: var(--muted); font-size: 15px; line-height: 2; }
.intro-number { display: flex; flex-direction: column; gap: 12px; padding-top: 48px; color: var(--green-dark); border-top: 1px solid #a8c7ba; }
.intro-number strong { font-size: 56px; font-weight: 300; line-height: .9; }
.intro-number span { font-size: 12px; line-height: 1.8; }

.book-capabilities { padding: 112px 0 126px; background: #fff; }
.section-heading { display: flex; justify-content: space-between; align-items: end; padding-bottom: 46px; border-bottom: 1px solid var(--line); }
.section-heading > p { max-width: 275px; margin: 0 0 5px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.capability-card { min-height: 285px; padding: 39px 28px 28px 0; border-right: 1px solid var(--line); }
.capability-card + .capability-card { padding-left: 28px; }
.capability-card:last-child { border-right: 0; }
.capability-icon { display: flex; align-items: center; justify-content: center; width: 45px; height: 45px; color: var(--green-dark); border: 1px solid #b5daca; font-size: 23px; font-weight: 300; }
.capability-card h3 { margin: 28px 0 13px; font-size: 19px; font-weight: normal; }
.capability-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.capability-card a { display: inline-block; margin-top: 22px; color: var(--green-dark); font-size: 13px; }
.capability-card a span { margin-left: 16px; font-size: 16px; }
.capability-featured { background: #f0f8f4; padding-left: 28px; }

.book-scenarios { padding: 110px 0; color: #fff; background: #14232b; }
.scenario-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 120px; }
.scenario-layout h2 { color: #fff; }
.scenario-list { border-top: 1px solid rgba(255,255,255,.24); }
.scenario-list div { display: grid; grid-template-columns: 43px 1fr; grid-template-rows: auto auto; gap: 5px 14px; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.24); }
.scenario-list span { grid-row: 1 / span 2; color: var(--green); font-size: 13px; }
.scenario-list b { font-size: 17px; font-weight: normal; }
.scenario-list small { color: rgba(255,255,255,.58); font-size: 12px; }

.book-contact { padding: 105px 0; background: var(--green); }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 120px; align-items: end; }
.contact-layout h2 { color: #0e3022; }
.contact-copy p { max-width: 330px; margin: 0 0 28px; color: #155237; font-size: 15px; line-height: 1.9; }
.qrcode-box { display: inline-flex; flex-direction: column; align-items: flex-start; }
.qrcode-box .qrcode { max-height: 0; margin-top: 0; padding: 0 10px; overflow: hidden; opacity: 0; transform: translateY(-6px); background: rgba(255,255,255,.96); border-radius: 12px; box-shadow: 0 14px 36px rgba(11,40,28,.14); transition: max-height .24s ease, margin-top .24s ease, padding .24s ease, opacity .18s ease, transform .18s ease; pointer-events: none; }
.qrcode-box:hover .qrcode, .qrcode-box:focus-within .qrcode { max-height: 220px; margin-top: 16px; padding: 10px; opacity: 1; transform: translateY(0); pointer-events: auto; }
.qrcode-box .qrcode img { width: 184px; height: 184px; display: block; }
.button-dark { color: #fff; background: #14232b; }
.button-dark:hover { background: #263b46; }
.book-footer { background: #0f1a20; color: rgba(255,255,255,.65); }
.footer-layout { display: flex; align-items: center; min-height: 78px; gap: 18px; font-size: 13px; }
.footer-layout > span { color: var(--green); font-size: 18px; font-weight: 700; }
.footer-layout > small { color: rgba(255,255,255,.72); font-size: 13px; }
.footer-layout a { margin-left: auto; color: var(--green); }

@media (max-width: 900px) {
	.book-header { height: 72px; }
	.book-header-inner { width: calc(100% - 42px); }
	.book-nav { gap: 18px; }
	.book-nav a:nth-child(n+4) { display: none; }
	.book-hero { min-height: 680px; }
	.hero-content { padding-top: 150px; }
	.intro-layout, .scenario-layout, .contact-layout { grid-template-columns: 1fr; gap: 35px; }
	.intro-number { width: 160px; padding-top: 22px; }
	.section-heading { align-items: start; flex-direction: column; gap: 24px; }
	.capability-grid { grid-template-columns: repeat(2, 1fr); }
	.capability-card:nth-child(2) { border-right: 0; }
	.capability-card:nth-child(3), .capability-card:nth-child(4) { border-top: 1px solid var(--line); }
}

@media (max-width: 560px) {
	.book-shell { width: calc(100% - 36px); }
	.book-header-inner { width: calc(100% - 36px); }
	.book-logo { width: 116px; }
	.book-nav { margin-left: auto; font-size: 12px; }
	.book-nav a:nth-child(n+3) { display: none; }
	.book-hero { min-height: 670px; }
	.hero-photo { background-position: 60% center; }
	.hero-overlay { background: linear-gradient(90deg, rgba(8,17,24,.93), rgba(8,17,24,.62)); }
	.hero-content { padding-top: 135px; }
	.eyebrow span { display: block; margin: 10px 0 0; }
	.hero-content h1 { margin-top: 30px; font-size: 42px; }
	.hero-description { font-size: 14px; }
	.hero-actions { flex-direction: column; align-items: flex-start; }
	.hero-proof { margin-top: 55px; }
	.hero-proof span { min-width: 0; padding-right: 13px; margin-right: 13px; }
	.hero-proof b { font-size: 13px; }
	.hero-proof small { font-size: 10px; }
	.hero-scroll { display: none; }
	.book-intro, .book-capabilities, .book-scenarios, .book-contact { padding: 70px 0; }
	.qrcode-box .qrcode { padding: 0 8px; border-radius: 10px; }
	.qrcode-box:hover .qrcode, .qrcode-box:focus-within .qrcode { max-height: 184px; margin-top: 14px; padding: 8px; }
	.qrcode-box .qrcode img { width: 152px; height: 152px; }
	.intro-layout h2, .section-heading h2, .scenario-layout h2, .contact-layout h2 { font-size: 32px; }
	.capability-grid { grid-template-columns: 1fr; }
	.capability-card, .capability-card + .capability-card { min-height: 0; padding: 28px 0; border-right: 0; border-top: 1px solid var(--line); }
	.capability-card:first-child { border-top: 0; }
	.capability-featured { padding-left: 20px !important; padding-right: 20px !important; }
	.footer-layout { min-height: 100px; flex-wrap: wrap; padding: 22px 0; }
	.footer-layout a { margin-left: 0; width: 100%; }
}