:root { color-scheme:dark; --navy:#071321; --navy2:#0b1d31; --ink:#f1efe9; --muted:#c4cbd1; --gold:#ebc17a; --line:rgba(235,193,122,.28); }
* {box-sizing:border-box} html {scroll-behavior:smooth} body {margin:0;color:var(--ink);background:var(--navy);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif} a {color:inherit;text-underline-offset:4px} a:focus-visible {outline:3px solid #fff;outline-offset:4px} p,h1,h2,h3 {margin-top:0} .wrap {width:min(1160px,calc(100% - 64px));margin:auto}
.site-header {background:#06111e;border-bottom:1px solid var(--line)} .header-inner {min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:25px} .brand {display:block;padding-left:17px;border-left:3px solid var(--gold);text-decoration:none} .brand-ja {font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:1.08rem;letter-spacing:.06em;display:block} .brand-en {display:block;color:var(--gold);font-family:Georgia,serif;font-size:.67rem;letter-spacing:.15em;margin-top:4px} .header-links {display:flex;gap:25px;align-items:center}.back-link {font-size:.87rem;text-decoration:none;white-space:nowrap;border-bottom:1px solid var(--gold);padding-bottom:6px}.back-link span {color:var(--gold);margin-left:6px}
.kicker {font-family:Georgia,serif;color:var(--gold);font-size:.84rem;letter-spacing:.21em;margin-bottom:23px}.hero {background:radial-gradient(circle at 74% 42%,#173856 0%,#0a2238 36%,#071321 75%);border-bottom:1px solid var(--line)}.hero-inner {display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:35px;min-height:505px;padding-block:72px}.hero h1 {font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-weight:500;font-size:clamp(3rem,6vw,5.5rem);letter-spacing:.11em;line-height:1.25;margin-bottom:30px}.sub-title {display:block;font-family:Georgia,"Yu Mincho",serif;font-size:.27em;letter-spacing:.14em;color:var(--gold);margin-top:12px}.lead {font-size:1.06rem;line-height:1.95;max-width:42rem}.lead strong {font-weight:600}.hero-note {color:var(--gold);margin:24px 0 0;font-size:.95rem;letter-spacing:.06em}.hero-logo {display:block;width:min(100%,470px);height:auto;filter:drop-shadow(0 20px 45px rgba(0,0,0,.35))}
.section {padding:94px 0 108px;border-bottom:1px solid var(--line)}h2 {font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(2rem,3.6vw,3.35rem);font-weight:500;letter-spacing:.08em;margin-bottom:46px}.overview {background:#0a1929}.facts {display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.fact {padding:27px 23px 26px;min-height:225px;border-right:1px solid var(--line)}.fact:first-child {padding-left:0}.fact:last-child {border:0}.fact-label {color:var(--gold);display:block;font-size:.9rem;letter-spacing:.1em;margin-bottom:23px}.fact strong {display:block;font-family:Georgia,"Yu Mincho",serif;font-weight:400;font-size:clamp(1.38rem,2.2vw,2rem);line-height:1.38}.fact strong small {font-size:.45em;color:var(--gold)}.fact p {color:var(--muted);line-height:1.7;font-size:.89rem;margin:14px 0 0}
.prizes {background:radial-gradient(circle at 20% 80%,#112840,#071321 68%)}.prize-grid {display:grid;grid-template-columns:1fr 1fr;gap:20px}.prize {min-height:270px;padding:33px 35px;border:1px solid var(--line);background:linear-gradient(140deg,rgba(25,67,99,.38),rgba(7,19,33,.3));display:flex;flex-direction:column}.prize.grand {background:linear-gradient(135deg,rgba(191,142,66,.22),rgba(7,19,33,.4))}.prize-no {font-family:Georgia,serif;color:var(--gold);font-size:.87rem;letter-spacing:.17em}.prize h3 {font-family:"Yu Mincho",serif;font-size:clamp(1.9rem,3vw,2.9rem);font-weight:500;margin:42px 0 8px}.prize h3 small {font-size:.5em;color:var(--gold)}.prize p {font-size:1rem;line-height:1.8;color:var(--muted);margin:auto 0 0}.prize-value strong {font-size:1.8em;color:#fff;font-weight:500}
.method {background:#0b2035}.heading-aside {font-family:system-ui,sans-serif;font-size:.42em;color:var(--gold);margin-left:16px}.steps {list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:40px}.steps li {display:flex;gap:23px;border-top:1px solid var(--line);padding-top:30px}.step-no {font:2.4rem Georgia,serif;color:var(--gold);line-height:1}.steps h3 {font-size:1.22rem;margin-bottom:14px}.steps p {color:var(--muted);line-height:1.85}.steps a {color:#f3cb8a;overflow-wrap:anywhere}
.rules {background:#081523}.rules-intro {font-size:1.03rem;color:var(--muted);margin:-24px 0 38px}.rule-list {border-top:1px solid var(--line)}.rule-list article {display:grid;grid-template-columns:75px 1fr;gap:20px;border-bottom:1px solid var(--line);padding:27px 0}.rule-list article>span {font:1.6rem Georgia,serif;color:var(--gold)}.rule-list h3 {font-size:1.12rem;margin:0 0 10px}.rule-list p {color:var(--muted);line-height:1.9;font-size:1rem;margin:0;max-width:850px}
.end-cta {padding:110px 0 125px;background:linear-gradient(120deg,#122f4b,#081726 72%);text-align:center}.end-cta h2 {margin-bottom:18px}.end-cta p:not(.kicker) {color:var(--muted);line-height:1.8}.button {display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:62px;min-width:270px;background:linear-gradient(115deg,#f3daaa,#d6a250);color:#172332;text-decoration:none;font-weight:700;margin-top:25px;padding:17px 28px;transition:transform .2s,filter .2s}.button:hover {transform:translateY(-2px);filter:brightness(1.07)}.button span {font-size:1.3rem}
footer {background:#050e18;border-top:1px solid var(--line);padding:34px 0}.footer-inner {display:flex;justify-content:space-between;gap:20px;color:#b9c4cb;font-size:.85rem}.footer-inner a {text-decoration:none;color:var(--ink);font-family:"Yu Mincho",serif;font-size:1rem}.footer-inner span {font-family:Georgia,serif;letter-spacing:.1em}
@media(max-width:850px) {.facts {grid-template-columns:repeat(2,1fr)}.fact:nth-child(2){border-right:0}.fact:nth-child(-n+2){border-bottom:1px solid var(--line)}.fact:nth-child(3){padding-left:0}.hero-inner {min-height:0}.hero-logo {width:100%}}
@media(max-width:640px) {.wrap {width:calc(100% - 36px)}.header-inner {min-height:70px}.brand-ja {font-size:.85rem;letter-spacing:0}.brand-en {display:none}.header-links {gap:12px}.back-link {font-size:.74rem}.hero-inner {display:flex;flex-direction:column-reverse;align-items:stretch;padding:36px 0 56px;gap:12px}.hero-logo {width:min(58%,235px);margin:auto}.hero h1 {font-size:2.75rem;margin-bottom:24px}.lead {font-size:1rem}.section {padding:69px 0 79px}h2 {margin-bottom:32px}.facts {grid-template-columns:1fr 1fr}.fact {min-height:200px;padding:20px 13px}.fact:first-child,.fact:nth-child(3){padding-left:0}.fact strong {font-size:1.35rem}.fact p {font-size:.84rem}.prize-grid,.steps {grid-template-columns:1fr;gap:17px}.prize {min-height:215px;padding:26px}.prize h3 {margin-top:28px}.steps li {gap:15px}.rule-list article {grid-template-columns:43px 1fr;gap:10px}.end-cta {padding:80px 0 95px}.footer-inner {display:block}.footer-inner span {display:block;margin-top:12px}}
@media(max-width:390px) {.facts {grid-template-columns:1fr}.fact,.fact:first-child,.fact:nth-child(3){border:0;border-bottom:1px solid var(--line);min-height:auto;padding:22px 0}.fact:last-child{border:0}.hero h1 {font-size:2.4rem}}
@media(prefers-reduced-motion:reduce) {html {scroll-behavior:auto}.button {transition:none}}